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Terms of pregnancy: obstetric and embryonic - how to determine and not get confused in terms. Online pregnancy calculator by week by date of last menstruation Last menstruation October 5 how many weeks of pregnancy

The process of the birth of a new life can only be compared with magic. A woman feels such transformations only in a special period. Not only her body, feelings, but also the awareness of the whole world is changing. Together with the child, the expectant mother goes through a huge stage from the appearance of one cell to the birth of a new inhabitant of the planet.

Pregnancy week by week, the development of the fetus and the sensations of a woman will make it possible to understand the changes that occur at the physiological and psychological level. The whole period will last 40 weeks, or 10 lunar months, each of which will have 28 days (full cycle).

1 week pregnant

Under the first week of obstetric terms, it is considered to be the last day of menstruation. During this period, conception does not necessarily occur, it can happen after 2 or 3 weeks, depending on the time of ovulation. You can learn about the onset of the long-awaited state only by measuring the basal temperature. At this time, home tests for blood donation for hCG will not show the true result. There are no obvious signs, the woman is still active, the body is only going through the preparatory stages.

Fertilization

The fusion of the egg and sperm takes place in the fallopian tube. As soon as fertilization has occurred, one main cell is formed - the zygote. It is she who is the basis of all systems and organs that will be laid and formed over 9 months. The first violent chemical reactions begin, an increased synthesis of special hCG hormones is observed on days 5-6. This will reduce the immune defense of the mother's body, to save the embryo.

get rid of bad habits, smoking, alcohol;
start eating right, the body should receive proteins, fats and carbohydrates in a ratio of 1: 1: 4, respectively;
avoid medical procedures associated with radiation, when taking medications, you should consult a doctor;
you may need multivitamins, including folic acid, it is advisable for the expectant mother to start the course even at the planning stage.

The feelings of a woman do not differ, she leads a habitual way of life, physiological changes will come a little later. But some, mothers, with a very developed intuition and sensitivity, can determine the exact onset of conception without tests and analyzes.

2 weeks pregnant

According to obstetric dates, this is the time of ovulation. During this period, after the end of menstruation, the body is actively preparing for reproductive function. The ovaries release an egg, if there are several, a multiple pregnancy can occur. Through the abdominal cavity it goes to the fallopian tube, the whole process is controlled by the hypothalamus. The egg cell waits for the onset of conception throughout the day. The sperm cell has a higher viability up to 5 days.

The time of ovulation falls in the middle of the cycle, if it consists of 28 days, then on the 14th day the egg matures. If conception did not happen, then after 2 weeks the unfertilized female cell is excreted during menstruation.

Feelings of a woman:

the hormonal background changes, sensitivity to smells may appear;
pulling sensations in the lower abdomen;
increased libido, development of sensuality and sexuality.

You can calculate the moment of ovulation using special pharmacy tests, or by measuring basal temperature!

These are optional symptoms, more often a woman does not notice such subtle processes that tune her body to motherhood.

3 weeks pregnant

In fact, this is the first week of the birth of the future life. Conception occurs as follows. The most active and strong sperm reach the egg in 1-2 hours, the rest are destroyed by the protective cells of the female reproductive system. The egg is many times larger than the sperm and consists of several membranes. The strongest and fastest gets inside, and fusion begins, with the formation of a unique set of chromosomes. The rest of the spermatozoa die.

The resulting zygote moves from the fallopian tube into the uterine cavity. At this time, it is nourished by protein compounds of tissues, as well as an internal supply. As soon as it is fixed on the walls of the uterus, the process of preparing the mother's body begins. Embryo implantation may be accompanied by scanty spotting, sometimes a woman simply does not notice them.

A woman's feelings depend on her sensitivity. Some people experience nausea, weakness, dizziness. The most important thing at this stage is to ensure sufficient intake of protein, folic acid, calcium and iron. Therefore, it is worth adjusting the diet and daily routine, overwork and stress can adversely affect the course of development.

4 weeks pregnant

During this period, the placenta and amniotic fluid begin to form, they will ensure the life of the baby. In addition, the head appears, 3 main layers are also laid, after which systems and organs will develop. Paternal genes are responsible for their formation.

Appearance of the embryo:

ectoderm - the formation of the brain;
endoderm - organs of the gastrointestinal tract, thyroid gland, liver;
mesoderm - musculoskeletal and circulatory system.

Mom's Feelings:

there is a sharp change in mood, drowsiness, or vice versa - a surge of energy;
increased irritability to smells, tastes;
nausea in the morning, dizziness;
the breasts may already increase, the sensitivity of the nipples will increase.

It will be possible to determine pregnancy using a test or ultrasound. During this period, you need to provide good nutrition, sparing regimen. It is important to take care of immunity, avoid attending mass events, and contact with patients.

5 weeks pregnant

The expectant mother is already beginning to suspect a new condition, because menstruation should have happened a week ago. In addition to psycho-emotional moments, there are other signs of conception.

Physiological changes in a woman:

the amount of secretions increases, normally they resemble mucus, like chicken protein, at this time a plug is formed that protects the fetus from infections until the moment of delivery;
heaviness and pain in the lower abdomen may signal the development of a threat, or be part of a natural process, in any case, a gynecologist's consultation is necessary;
fainting and dizziness indicate sharp jumps in sugar, so the entire daily diet should be divided into small portions, increasing the number of doses;
emotionally, instability is observed, fears, doubts, unrest for the assigned responsibility appear.

Child

The baby reaches a size of 1.7-2 cm, a large head and a small body give a resemblance to a tadpole. This is a very important period, as the laying of the spinal cord and brain takes place. A small heart beats and the blood cycle is carried out. At this time, it is important for the mother to continue taking folic acid for the normal development of the nervous system, to ensure proper sleep and rest.

6 weeks pregnant

This week, using ultrasound, you can measure the KTP (coccygeal-parietal size), its norm of 5-6 mm indicates proper development. In addition, in the pictures it will be possible to see the tubercles of the arms and legs, the laying of the fingers begins, they will soon become full-fledged limbs. In the meantime, the formation of the mouth, chin, cheeks.

Changes in the expectant mother:

hormonal changes begin to affect eating habits, hunger is constantly felt, or vice versa, foods cause nausea;
weight gain does not yet occur, if there is toxicosis, a woman may even lose weight;
if the discharge changes, is accompanied by a specific smell and discomfort, you need to urgently consult a doctor, the risk of fungal diseases is high;
the area in the lower abdomen may increase, which is easy to detect by clothing, the lack of muscle tone of the uterus gives such an effect.

Avoid any contact with chemicals, detergents, tobacco smoke. You should also not visit baths, beaches, solariums, pools.

7 weeks pregnant

The main feature is the replacement of the corpus luteum with the placenta, which by this time should be fully formed and perform its nutritional and protective functions. The risk is present if previous infections have led to abnormalities.

Fetal development by week of pregnancy description with photo:

grows by leaps and bounds, reaching a size of 1.8 cm and a weight of 2 grams;
both hemispheres of the brain have already been formed, the construction of the nervous system continues;
the body is exactly the size of the head, there is also a small tail on the coccyx;
blood circulation is completely improved, the placenta now supplies oxygen, nutrients, protects against the ingress of toxins, infections, pathogenic microflora;
the musculoskeletal system continues to form, fingers are visible, skeletal tissues turn into bone tissue, the embryo can bend its elbows and knees;
the heart already consists of 4 chambers, it pumps blood through a small organism;
a nose appears on the face, with nostrils, also the upper lip, the auditory system is formed, the rudiments of teeth are laid in the mouth;
the covers already consist of 2 layers, the upper one is the epidermis;
by the end of the seventh week, a mound appears between the limbs, a little later it will be possible to determine whether it is a boy or a girl.

The expectant mother is already beginning to feel all the difficulties of pregnancy. Toxemia, nausea and drowsiness can be accompanied by swelling, frequent urination, gas formation and disturbances in the digestive system. The baby develops very quickly, respectively, the uterus reaches the size of an orange, which is accompanied by heaviness and pressure in the lower abdomen. The areolas of the nipples darken, a line is outlined along the lower abdomen to the navel.

8 weeks pregnant

The main symptoms are clearly manifested, according to which inattentive women, forgetting about the delay, can accurately guess their position.

Main features:

the silhouette of a woman is noticeably rounded, in the area of \u200b\u200bthe abdomen, chest, hips, the gait becomes smooth, measured;
the condition of the skin will change, for better or worse depends on individual characteristics, or rashes and redness appear, or vice versa - the face will be clean, fresh, without a single speck;
taste preferences are quite original, the desire to eat something out of season occurs very often, or a pregnant woman becomes selective in food, stopping at just a few products.

The baby continues to grow, reaching about 2 cm, and weight 2-3 grams. Almost all systems are laid down, their further development continues. The tail disappears, the ability to randomly move arms and legs appears, he opens his fingers. Bones and joints become stronger every day.

The visual system is being formed, the embryo becomes less like an alien, the eyes are located closer to each other. On ultrasound, you can see the ear canal, the face has a clearer contour with barely noticeable facial expressions. At this time, the baby can already respond to touch.

9 week

This period characterizes intensive growth and transition from embryo to fetus. The head is still quite large and lies on the chest, arms and legs are well formed. The baby can move through the amniotic fluid as long as its small size (about the size of a grape) allows. The genitals are marked, but it is not yet possible to determine by ultrasound, you need to take a blood test.

It is important for a woman to still monitor her health, if bloody, yellow, green discharge appears, you need to see a doctor. Also, pain in the lumbar region and lower abdomen should be alerted. The doctor may recommend a consultation with a geneticist, if necessary, a chorion biopsy is taken to detect developmental anomalies.

The diet should be dominated by fresh and high-quality products. If you suffer from heartburn, you should avoid spicy spicy dishes. Rosehip decoctions and green tea without sugar will alleviate toxicosis.

10 week

A calmer period begins, the expectant mother gets used to the new state, and the baby has already formed systems and organs, the development of the brain continues. Its weight approaches 7 gr., The head gradually begins to rise from the chest. The most amazing thing at this time is the development of the brain. The process occurs at an incredible speed, new chains of neurons are formed every minute. The fingers continue to lengthen, but the membranes between them remain. The main organs - the liver, kidneys, lungs, intestines, are located correctly, continue to improve. The synthesis of sex hormones begins, in girls - estrogen, in boys - testosterone.

The woman's breasts increase even more, the veins noticeably appear. The tummy is rounded enough to think about comfortable clothes. The uterus continues to grow with the baby, so the pressure on the pelvic organs increases. It is important to keep a positive attitude, pamper yourself with gifts, not worry about changing body shapes. It is worth picking up beautiful underwear, clothes in order to continue to feel beautiful and happy.

11 week

The baby already weighs about 11 grams, and the size is about 5-6 cm, according to the first ultrasound, you can determine the development of the fetus, its compliance with the standards. The heart beats very fast - 140 beats per minute. The growth of blood vessels in the placenta is activated, the child is growing rapidly and requires more nutrients. The auricles are formed, hair follicles are laid.

For expectant mothers suffering from toxicosis, gradual relief occurs. By week 14, morning discomfort should be gone. Increased urination is a normal response of the body to hormonal changes. You need to drink clean water, as well as healthy drinks, it is better to limit foods containing caffeine. You can also start (if there are no threats) to do fitness for pregnant women, and use oils for stretch marks, the most effective are almond, sesame, olive.

12 week

The end of the 3rd month makes you forget about the risks that have existed since the day the embryo was conceived. This is the time when a woman is already accustomed to a new state and can enjoy it. In appearance, there are noticeable transformations. The skin is fresher, more elastic, hair grows better, they have become thicker, silkier. Many pregnant women forget about rational nutrition, believing that everything can be afforded during this period.

you should forget about harmful fast foods, snacks, street food, spicy, spicy, fatty foods can lead to constipation, affect the baby's condition;
do not overeat, trying to fulfill the norm for two, excess weight complicates the process of childbirth and subsequent rehabilitation;
you need to forget about your own taste preferences, eating cottage cheese, fish, lean meats, nuts, fruits, vegetables.

The fruit reaches 5 cm, and the weight is about 12-14 grams. The lungs are gradually strengthened, the work of the gastrointestinal tract is getting better. The baby is trying to raise his head, he can already suck his thumb. There is sensitivity to pain, reacts to sounds.

13 week

The 2nd trimester begins, the same recommendations for nutrition and moderate physical activity remain. A woman may notice a completely blurred waist line, and a breast that has increased by several sizes. It is necessary to pick up special underwear, often discharges are observed from the nipples - this is colostrum. You can forget about frequent trips to the toilet, raising the uterus relieves discomfort. With the appearance of pulling pain in the lower abdomen and lower back, you need to contact a gynecologist. Allocations normally remain white, transparent, without pungent odors.

The child weighs from 15-20 grams, his height reaches 6-7 cm. The sensitivity of the baby is rapidly developing. It can respond to temperature changes, light, music, noise, pain.

Physiological development:

eyes move closer and closer to each other;
bones continue to harden, and muscles grow and improve;
the ears take shape;
a dream appears, it lasts only a few minutes;
motor activity includes various movements, in addition to bending, it can cross limbs, make chaotic swings.

14 week

All the fears and doubts gradually disappear in the expectant mother. She learns to enjoy the harmony of life, there is a reassessment of priorities. The uterus continues to rise, and the breasts grow. A woman already needs to pick up more loose and comfortable clothes. At this time, you should not indulge yourself with sweets, it is better to provide the child with high-quality protein. The average weight gain is 1.5-2 kg from conception, it is important to follow the clock and not overeat.

The baby continues to develop rapidly, reaching a weight of 50 grams, with a height of 10 cm. Expressed facial expressions appear, as well as sleep and wakefulness patterns. The respiratory system is trained, insulin production begins. Heart rate often depends on the behavior of the mother. Her bad habits and stress can lead to a noticeable increase in the fetal heart rate.

If you haven't had an ultrasound yet, now is the time. The doctor can accurately measure the parameters of the child, determine compliance with the standards.

15 week

The expectant mother continues to lead an active lifestyle, not forgetting to monitor her health.

Discomfort may be related to:

with the condition of the teeth, it is imperative to go to the dentist, cure caries, bleeding gums in order to prevent the occurrence of infection;
reduced immunity leads to respiratory diseases, it is important to limit trips to public places, if symptoms appear, the doctor will advise safe medicines;
weakness, the desire to relax, sleep - is typical for such hormonal changes, you should not deny yourself, because when the baby is born, sleep will become a luxury;
with an increase in veins, you need to choose the right shoes, you may need light gymnastics to relieve fatigue;
pain in the lower abdomen is not always associated with abnormalities, the growth of the uterus is reflected in the stretching of muscles and ligaments.

The baby reaches the size of an apple, his movements are still active, and his sleep is short. The eyes are still closed, but the optic nerves are formed, the child can distinguish between light and shadow. The first hairs break through, the sweat glands work.

16 week

The fetus becomes more and more like a baby. His body is covered with light fluff, the skin is still thin, vessels are visible. Height is 11-14 cm, and weight reaches 110 grams. The chemical composition of the blood changes, erythrocytes, platelets, lymphocytes appear, hemoglobin synthesis occurs. All features are already pronounced on the face, eyebrows and cilia are looming. The fetus is covered with a special white lubricant that protects the thin skin until the very process of childbirth.

The expectant mother continues to monitor her diet, sudden weight gains will lead to dangerous changes in pressure. The gait becomes like that of a duck, fatigue appears in the legs. If the pregnancy is not the first, you can already feel the movements of the fetus.

17 week

The performance of a woman decreases. She needs the support of her loved ones more than ever. Heaviness, pain in the sacrum, weight gain, affect the activity of the mother, her fatigue. From time to time it can throw into heat, then into cold, sudden mood swings are characterized by accumulated fatigue. The support of not only the husband, but also all relatives is important, someone can cook soup, someone can take the documents to the hospital.

The baby reaches a height of 13 cm, sleeps for more time, and then stretches and grimaces. Responds well to sounds, sharp, loud - frighten, mother's voice - will soothe. The pituitary and adrenal glands are actively working, in girls the formation of internal reproductive organs begins.

18 week

The tummy is quite pronounced and the mother has to choose sleeping positions, the left side is considered the most favorable for childbirth. A good appetite must be restrained, during this period there is a significant increase in weight. Carbonated drinks and large servings are fraught with constipation and bloating. A large need for calcium can affect the condition of the teeth, so the presence of fermented milk products in the diet is mandatory. Sensitivity of the breast, darkening and expansion of the areola, an increase in size, provoke depression. Do not despair, after childbirth, with a balanced diet, you will be able to quickly return to normal.

The child reaches 18 cm and weighs 200 gr. It is important to talk with the baby, it stimulates the development of his central nervous system. Mom can feel the first tremors during the period of activity, the musculoskeletal system develops. Unique prints have already appeared on the fingers.

19 week

Toxicosis and heartburn have finally receded, but a pregnant woman may be disturbed by itching of the skin of a growing abdomen. It is worth using special creams or oils to reduce sensitivity. With fatigue and cramps in the legs, Magnesia preparations may be prescribed. Relaxing exercises can help with back pain. It is important to alternate modes of activity and rest. If there are no threats and pathologies, you need to walk a lot, do what you can. Self-imposed bed rest can complicate the process of childbirth due to muscle weakness.

The child reaches 220-250 gr., sleeps most of the day, and during wakefulness you can feel his movements. If the mother walks, it is the baby that cradles, as soon as she lies down to rest, tremors are immediately felt. The sebaceous glands continue to produce a white protective lubricant.

At this time, it is necessary to pass a control urinalysis and a planned second ultrasound. On it, you can already accurately find out the gender and get a photo of the baby.

20 week

The rest period for the expectant mother, she enjoys her condition and blooming appearance. The tummy is small, neat, does not interfere with movement and doing the usual things. According to her feelings, a woman can understand how the baby develops. Strong intense shocks will be a signal of a lack of oxygen, you need to go out into the fresh air or ventilate the room. If this happens after physical activity, you need to lie down to rest, then the baby will calm down. A woman is recommended to already sleep on her side to avoid squeezing the veins. Foods rich in calcium and iron remain the basis of nutrition - beef, buckwheat, cottage cheese, spinach, prunes.

The kid weighs about 280 grams, his height is 22-25 cm, he can not only yawn and somersault, but also play. The legs become longer and more proportional to the body, the head gradually becomes smaller. The skin thickens and already consists of 4 layers, the protective lubricant continues to be produced. Nails appear on the arms and legs, the first hairs appear on the head.

21 weeks

The most interesting thing at this stage is the opportunity for the mother to form the future taste preferences of the child. If you eat spicy, spicy, salty sweet dishes, you will have to make a lot of effort after that so that the baby tries broccoli, buckwheat or carrots.

For mom, there are problems with flatulence, stress on the veins and appetite control. Extra pounds can lead to a large fetus and complications during childbirth. Small portions and frequent meals will save you from feeling hungry. Nails and hair have significantly accelerated growth, and their condition has changed for the better.

The child reaches a height of 26 cm, weight - 330-350 gr. Outwardly, he already looks like a newborn, it remains only to gain kilograms and grow. Amniotic fluid allows the baby to know what mom ate for lunch. When the fetus moves, noticeable tubercles may appear on the abdomen.

22 week

At this time, the stomach is already visible, even under outerwear, if there are no medical prescriptions, a woman can continue to lead a normal life. The condition of the skin improves, the expectant mother blooms. It is worth paying attention to puffiness, with fluid retention, you need to reduce the amount of salt. If physiological anemia is detected, additional tests are taken to make an accurate diagnosis. It is already necessary to undergo a planned ultrasound, determine the development of the fetus, as well as the condition of the placenta.

The child weighs about 410 grams, height - 28-30 cm. Large sizes make motor activity difficult, most of the time he is in a fetal position. The formation of the brain slows down, it is the turn of the nervous system to improve, neurons are fully formed.

23 week

You can still enjoy your rest period. Heartburn, toxicosis are in the past, now the main thing is not to gain excess weight. On average, a woman gains 5-7 kg by this time. The abdomen rises higher, the expectant mother may feel tension and fatigue in the lower spine. If this period falls on a hot summer, swelling is difficult to avoid. It is worth slightly reducing the amount of liquid, as well as avoiding salty foods, it is useful to put your legs on elevations - pillows during rest. If cramps occur, you need to abandon shoes on the rise, also enrich the diet with foods containing calcium, vitamin E.

Child development:

weight increased to 400-420 gr., but the fetus itself looks wrinkled, it will soon accumulate subcutaneous fat and all wrinkles will disappear;
the main processes that the baby is busy with are the absorption of nutrients in the liquid, and after excretion with urine, due to the frequent change of amniotic fluid, this is not dangerous for the child;
the preparation of the respiratory organs begins, they are not yet fully formed, but the child is already doing the first trial exercises;
sleeps most of the day, he has a phase of REM sleep, which means the ability to see dreams.

24 week

The baby, along with the stomach, is growing, this can lead to the appearance of stretch marks. They can be frustrating for women, especially bright red or brown ones. But after childbirth, with proper physical activity, it will be possible to return to its previous shape.

Expectant mothers feel great - the first dangerous trimester has passed, and the birth is still far away. It is quite possible to work, relax, chat with friends, go on picnics. There are recommendations on nutrition, as well as the correct distribution of time - active mode and sleep.

if the doctor puts the breech presentation of the fetus, do not be upset, before the birth he will change his position;
the baby has grown to 25 cm and weighs about 500 grams;
inhales and exhales, but oxygen continues to flow through the umbilical cord;
there is a further formation of the brain, an increase in neural connections;
the baby can already play with the umbilical cord, grimace, frown, suck his thumb.

With the appearance of spotting blood discharge, acute pain in the lower abdomen and lower back, you need to urgently consult a doctor, you may need to be hospitalized to save it.

25 week

Each woman's belly will look different, despite the fact that everyone's uterus becomes the size of a ball. There is pressure on the stomach, which often provokes the occurrence of heartburn. To avoid digestive problems, in particular constipation, it is recommended to include vegetables and cereals in the basis of the diet. If there is a low level of hemoglobin in the blood, therapy with iron-containing drugs is prescribed. To reduce the load on the back, you can already start wearing a brace.

Baby development:

in case of premature birth, the newborn will be viable, he is placed in special conditions for maturity equal to 40 weeks;
weight becomes 700 gr., height 30-35 cm;
the skeletal system is strengthened, muscles are improved, a grasping reflex appears, the baby clenches his hands into fists and determines the leading hand - right or left.

26 week

The load on the female body is increasing every day. Forgetfulness, absent-mindedness are possible, so it's time to think about maternity leave. Walking becomes more and more difficult, especially if you have gained excess weight, normal fluctuations are from 6-8 kg. When moving, tension in the lower back can be felt, the gait approaches the pendulum. If there is a tone of the uterus, it is important to monitor your condition, prefer bed rest. With the appearance of contractions, bleeding, urgent medical attention is required.

the fetus already weighs about 1 kg, and its height is 33-35 cm;
pigmentation changes due to the accumulation of subcutaneous fat, the skin brightens;
the muscles become stronger, if the baby inadvertently pushes the internal organs, the mother may feel painful discomfort.

Fill your life with exceptionally pleasant emotions, do not forget about nutrition and exercise for pregnant women.

27 week

It becomes increasingly difficult for mom to do the usual things. Fatigue quickly sets in, you have to rest more. This is a natural process that allows a woman to arrange a small vacation. It is advisable to devote this period to your favorite activities and hobbies, because after the birth of the baby there will be no time. At week 27, you can begin to rapidly gain weight, it is important to control this process with the frequency and number of servings. There is shortness of breath, heartburn, which is associated with an increase and pressure of the uterus. The breast becomes larger, during the period of pregnancy it changes by 1-3 sizes.

Child development:

the brain grows and improves, the foundations of cognitive thinking are laid - memory, attention, the main features of temperament are also determined;
the need for calcium does not decrease, the final formation of bone tissue has not yet been completed;
there is a further accumulation of subcutaneous fat and changes in skin pigmentation;
the placenta helps form the first immunity that will protect the newborn for the first 6 months.

28 week

For most mothers, maternity leave has already begun. Depending on the kilograms gained, the sensations of the pregnant woman also change. More than 9 make movements awkward, provoke fatigue, drowsiness, and digestive problems.

It is worth listening to the recommendations of the doctor and arrange fasting days. By this time, the baby has already taken the correct position, the mother can even count the number of shocks, normally there should be about 10 in 2 hours. Back pain will be relieved by a bandage and special gymnastics, which will also come in handy during childbirth.

Formation of the child:

the accumulation of subcutaneous fat continues, wrinkles are smoothed out, the skin gradually brightens;
convolutions are formed in the brain, further growth and improvement of the rudiments of intellect continues;
emotions appear, the baby can frown at any discomfort, react with movements of the limbs.

If there is a Rh conflict, immunoglobulin therapy may be required, this will not harm the child, but will only avoid the risk of oxygen starvation of the fetus.

29 week

The baby is already getting cramped and it seems to the mother that the child has become stronger. In fact, its weight reaches 1.5 kg, height is 36-40 cm. The optic nerves allow you to more clearly examine the light, blink when changing its intensity. The child coughs and hiccups, and the mother feels it. The emotional sphere also does not stand still - the ability to cry appears. Internal organs are already formed. Muscles continue to grow, the respiratory system improves.

Feelings of a woman:

if the expectant mother has not yet changed her wardrobe, it’s time to do it, don’t be upset because of loose overalls, in a few months you can get back in shape;
the condition of the skin changes, it becomes drier, pigmentation appears;
in order to learn how to control your body during childbirth, it is advisable to master Kegel exercises, if not contraindications, yoga classes are useful;
irritation and fatigue increase, the stomach becomes larger, the load increases when walking, sleep only on the side.

30 week

The growth of the abdomen stretches the skin, it becomes thinner. Stretch marks also appear in the thigh area. Constipation and swelling can be corrected by proper nutrition. If the mother has dizziness and weakness, it is worth increasing the rest time. It is important during this period to learn relaxation techniques, they will help to cope with insomnia and accumulated fatigue.

Child development:

the process of interaction with the mother is being established, he calms down when stroking his stomach, reacts violently in an uncomfortable environment - a stuffy room, tobacco smoke;
small hairs gradually disappear - lanugo, which covered the body of the baby, but in some cases, the newborn may appear with him;
the brain continues to grow intensively, the number of convolutions and furrows increases.

31 weeks

At this time, all previous uncomfortable sensations intensify. The uterus has displaced all the internal organs, so shortness of breath becomes more frequent, breathing becomes difficult. Cramps, swelling, back pain interfere not only during the day, but also at night, causing insomnia. A positive attitude, relaxing massage, yoga classes will help to cope. It is worth reducing the amount of fluid, urination occurs very often, and a woman may even limit her walks. Such sacrifices are not needed, it is necessary to adhere to the correct diet, and not to drink an hour before going out.

Child development:

height reached 35-43 cm, weight - up to 1.6 kg;
trains the management of the main 5 senses;
neural connections grow at a feverish pace;
the period of wakefulness increases, the baby is busy with his own affairs - he breathes, looks, blinks, sucks his finger, clenches his fists, pushes.

32 week

The body is already gradually preparing for the process of childbirth. Some may even feel exercise contractions. The stomach is already large, it can pull, it is worth vilifying the bandage. The movements and gait of the woman became clumsy, she is slower in doing her usual things. You should not deny yourself the desire to sleep or buy a new thing, but you will have to forget about sweets and spicy dishes. It takes longer to choose a comfortable position, the tremors are becoming more intense.

Child development:

height up to 46 cm, weight 1.6-1.8 kg;
the fetus is still in breech presentation, but may already roll over head down;
brain development improves if you talk with your baby, read books, listen to music;
the muscular system continues to strengthen, movements are better coordinated.

It's time to undergo 3 planned ultrasound, you can find out not only the size and formation of the fetus, but also clearly see it on the screen. Important will be information about the state of amniotic fluid, uterus, placental maturity.

33 week

On average, a woman gained 10-12 kg during pregnancy. The hormonal background rises, which can provoke bleeding gums. Excessive irritability is caused by fear of the upcoming birth. It is important to maintain a positive attitude, fill life with joyful emotions, communicate with pleasant people. It is worth remembering feasible physical activity, it is necessary for muscle tone, otherwise it will be difficult to control your body during childbirth.

height - 40-46 cm, weight -2100-2300;
the child should already take the desired position, if not, during childbirth this will require additional attention from the obstetrician;
the sucking reflex necessary for breastfeeding is improved;
the musculoskeletal system continues to develop, so cottage cheese is required for the entire period of gestation;
the fetus already looks like a newborn, cheeks and folds appear on the arms and legs.

34 week

Hormonal changes allow mom to be in a good mood. She is tired of uncomfortable sensations, and she can not wait for the baby to appear. The weight increases noticeably up to 12-15 kg, the breast continues to grow. The line from the navel to the lower abdomen darkens, as well as the areola of the nipples. The nesting instinct is at its peak, the expectant mother is busy with household chores.

Baby development:

height 41-47 cm, weight 2100-2400;
the skin of the fetus is light and smooth, it is covered with a protective lubricant that facilitates the passage of the birth canal;
when born at this time, the child can breathe on his own, and does not require intensive rehabilitation therapy.

35 week

The most crucial moment begins, preparation for childbirth. It is useful for a future mother to take special courses in consultation. Choosing a partner for childbirth, it does not have to be a husband, a close person - a friend, mother - can support and reassure. A bag for the maternity hospital should already be assembled so that the woman does not get nervous over trifles. The abdomen reaches its maximum size, when walking, rapid fatigue occurs, swelling appears. It is important not to overeat at this time, otherwise the baby will be large, and the birth process will become more complicated.

Child development:

the training of the respiratory system, sucking, swallowing reflex continues;
the amount of amniotic fluid decreases, which causes discomfort for the baby, the body reports that it is time to change living conditions;
the endocrine, nervous and immune systems continue to improve;
gradually the baby descends, the mother can feel it in relieving breathing and reducing pressure on the back.

36-40 weeks

Everything is ready for the long-awaited emergence of a new life. 2 weeks before the birth, the stomach drops and turns to stone - this is a signal that the uterus is coming into tone. At any moment, fights can begin, both training and real. The woman has already gained from 9 to 16 kg, just before giving birth, there is a slight decrease. It is obligatory to attend a consultation once a week, the doctor monitors the condition of the fetus, the heartbeat.

Signs of the onset of labor:

increased appetite;
there is discomfort in the lower abdomen, after which it will turn into pain;
contractions begin with spasms with a frequency of 5 times per hour;
the body begins to cleanse itself - vomiting, diarrhea are possible;
the exit of the mucous plug and the discharge of amniotic fluid is a direct signal of the onset of labor, immediate hospitalization is required.

The child reaches a size of 50-54 cm, weighs about 3-3.5 kg. It becomes very crowded in the mother's womb, all organs are formed and ready to ensure life after birth. The baby is sensitive to light, can distinguish colors, very soon he will meet his mother. The female body is also preparing - the joints become softer and more elastic. If necessary, you will need to undergo an ultrasound to determine the condition of the placenta, the location of the fetus. The child does not stop developing even after childbirth, the process continues only now he can feel the warmth of his mother's hands.

Gestational age- one of the main components that a gynecologist needs to know about for the proper management of pregnancy. After all, on the basis of this, the doctor will prescribe the necessary examinations, tests, planned ultrasound scans, monitor intrauterine growth and fetal development, and identify possible violations in time. In addition, the determination of the term allows you to fairly accurately calculate the date of birth and the date of maternity leave. The woman herself needs to know the gestational age in order to mentally prepare for childbirth, to have time to prepare a room or a corner for the future baby, to purchase all the necessary accessories and clothes for him.

In the article, we will consider how to determine the gestational age.

Calculate by monthly

The gynecologist first of all asks a woman who has come to register at the antenatal clinic the question of when her last menstruation began. It is from this date that he begins to keep a record, despite the fact that fertilization has not yet occurred. It is known that the fertilization of the egg occurs on the day of ovulation, which occurs in the middle of the menstrual cycle. This method of determining the gestational age is called "obstetric".

An online calculator will help determine the term:

How to determine the gestational age by the date of conception

It is known that conception occurs only during ovulation within a day after the release of the egg from the follicle. And the viability of spermatozoa in the female genital tract is up to 3 days. It turns out that the date of sexual intercourse does not always coincide with the date of conception.

Ovulation occurs in the middle of the menstrual cycle. A woman who monitors her menstrual cycle can quite accurately calculate the onset of ovulation in herself. In addition, many at this time have characteristic signs: aching pains in the lower abdomen, breast swelling, irritability, copious vaginal discharge, increased sexual desire.

It is worth noting that only those women who have a regular menstrual cycle can determine the gestational age by the date of conception.

Online calculator:

(calculation will take a few seconds)

How to calculate by ultrasound

It is possible to find out the gestational age by the results of an ultrasound examination (ultrasound). It is determined according to the size of the fetus. The first ultrasound of the expectant mother is performed at 12-14 weeks, but it is still impossible to determine the exact date, since the development of the fetus in each woman occurs individually. Finding out the age of the fetus by ultrasound with an accuracy of one day is possible only in the first weeks after conception.

Determination of the entrance of the examination by a gynecologist

A gynecologist can determine a woman's gestational age by the size of her uterus during a pelvic exam. At 5-6 weeks, the size of the uterus can be compared with a chicken egg, at 8 weeks - with a goose egg. Later, it will be more difficult to determine how many weeks a woman has by the size of her uterus.

Find out the date by the first movement of the fetus

A woman begins to feel fetal movements in the first pregnancy at 20 weeks, in the second - at 18 weeks. But this method does not always allow you to set a time limit, since some expectant mothers may feel the first fetal movements earlier or later than the indicated weeks - some, due to the structural features of the body, cannot feel the fetal movements, others confuse the work of the intestines (increased flatulence) with movements.

Determine by hCG

Human chorionic gonadotropin (hCG)- one of the most important indicators indicating the onset of pregnancy and its normal development. The hormone begins to be produced in the female body after the implantation of the embryo into the wall of the uterus. The level of hCG in the blood allows you to find out the approximate age of the fetus. With multiple pregnancy, the level of the hormone in the blood increases in proportion to the number of fetuses.

week of pregnancy	HCG level, honey / ml
1 - 2	25 - 156
2 - 3	101 - 4870
3 - 4	1110 - 31500
4 - 5	2560 - 82300
5 - 6	23100 - 151000
6 - 7	27300 - 233000
7 - 11	20900 - 291000
11 - 16	6140 - 103000
16 - 24	4720 - 80100
21 - 39	2700 - 78100

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The pregnancy calculator allows you to calculate the exact due date and find out what week of pregnancy you are currently in, as well as the expected date of delivery. To calculate, select the date of the first day of your last period at the top of the calculator and click on the "Calculate" button. The calculator will then automatically display your current pregnancy week and expected due date.

For each week of pregnancy, two exact dates are displayed: the start day and the end day. The interval between them is exactly 7 days. You can scroll through the weeks of pregnancy using the arrows. The full list of weeks from 1st to 40th is at the very bottom of the calculator. By clicking on them, you can also scroll through the slider for the desired week. The trimester of pregnancy to which each week belongs is indicated by Roman numerals at the bottom (near the slider) and in the upper right corner of the cells (in the full list of weeks). Also, the trimesters are marked in pink, orange and blue, respectively. In general, the very concept of pregnancy trimesters is rather arbitrary and their boundaries are not clearly defined. We took as a basis the most common classification, in which the second trimester begins at the 14th week and ends at the 28th. Only your obstetrician-gynecologist can calculate trimesters more accurately after an ultrasound scan.

In the images you can see a rough illustration of the development of the baby inside the womb for each week. To the left of the images is a summary of the fetal growth for that week. For more complete and detailed information, you can find by clicking on the "More" link, which is located under each description.

Method for calculating the gestational age

The calculator calculates the so-called "obstetric" gestational age. It differs from the actual date by about two weeks. This calculation method is used in gynecology, because. it is very difficult to calculate the exact day of conception. Therefore, the calculation is based on the first day of the last menstruation, the date of which, as a rule, every woman remembers. 280 days or 40 weeks are added to this day. Thus, the first two weeks of the obstetric period you are not yet pregnant, because. ovulation has not yet occurred (based on an average menstrual cycle of 28 days). This method is not completely accurate because some women ovulate late or early. But, in general, for most expectant mothers, such a calculation turns out to be quite accurate.

In any case, we draw your attention to the fact that the pregnancy calculator allows you to calculate the term using the most general formula, which does not take into account the individual characteristics of your body. It cannot be used for self-diagnosis or any other medical purposes, since the results of its calculations are for informational purposes only. All precise calculations and any other manipulations should be done only by your attending physician.

This calendar is compiled on the basis of the actual gestational age, that is, from conception. The obstetric term, the one set by gynecologists, is ahead of the real one by 2 weeks. Consider this.

In the first week of pregnancy, the egg and sperm merge, a zygote is formed, from which the chorion (placenta) and the embryo (future child) will subsequently form. At conception, the sex of the baby is determined.

The second week of a baby's life is marked by the fact that the zygote finds a place in the woman's body where it will develop. It is implanted in the wall of the uterus or another organ (then an ectopic pregnancy occurs). In the urine and blood of a woman, chorionic gonadotropin (hCG) is determined.

In the third week, pregnancy tests “stripe”, the woman begins to delay menstruation and toxicosis. On ultrasound, most likely, the fetal egg will not be seen yet, it is too small. But the signs of pregnancy are already appearing. And a very tiny embryo begins its development. He has a well-defined body and head.

At the 4th week, the length of the embryo is 2-4 mm, and the fetal egg is about 1 cm or a little more. On good ultrasound equipment, they are clearly visible. If everything is normal, the fetal egg has an even shape. If there is a detachment of the fetal egg, the doctor poses a threat of spontaneous miscarriage. Most often, pregnancies are interrupted at this time due to severe fetal chromosomal abnormalities.

In the fifth week, the heart begins to work in the fetus, and it is its beats that are the main evidence that the pregnancy is developing. It's time to register with a gynecologist and be sure to read the calendar by weeks of pregnancy.

At 6 weeks, the embryo weighs about 5 grams and is about 20 mm long. It grows by a millimeter per day. Almost all of his organs are formed. There are even convolutions in the brain. And facial features are becoming more distinct.

At 7 weeks, doctors stop calling the little man an embryo. Now he is a fetus. And they will remain until the very birth. The baby is very mobile in the uterus, moving with might and main, surrounded by amniotic fluid, but mom does not yet feel his movements. The fruit is still very small.

At 8 weeks, the size of the baby can be compared to prunes. While the baby, but the body is already formed. There are even tiny nails on the hands. In the future, all organs and systems will only improve.
Nine weeks is the minimum period at which the doctor can see the so-called genital tubercle in the fetus and suggest its gender. The accuracy of this "prediction" depends on the experience of the doctor and the quality of the equipment used.

The next week is marked by the first screening - ultrasound plus a blood test. The baby has grown so much that the doctor can accurately diagnose possible chromosomal abnormalities in him.

Week 11 is the last on which the screening will be informative. Don't forget to pass! The baby is growing at a fast pace. He began to bleed, and colorless fluffy hairs appeared on his head.

On 2D ultrasound at twelve weeks, the baby now looks more like a small humanoid, but on 3D, facial features are visible. True, there is still not enough fatty tissue, and the baby's face looks very thin. The first innate reflexes and facial expressions appear.

All 9 months of pregnancy in 4 minutes.

Over the next week, some mothers begin to feel the first movements of the babies. Mostly these are women who are not the first baby. The growth of children reaches 10 centimeters, and the weight is 50 grams.

At 14 weeks, the sex of the baby is clearly visible on the ultrasound. There shouldn't be any mistakes. However, sometimes it cannot be determined if the baby is in an uncomfortable position. Babies at this gestational age begin to make respiratory movements and squint if a source of bright light is directed to their mother's stomach.

By the fifteenth week, a pregnant tummy begins to appear in mommy. You have to buy clothes for expectant mothers or suitable for a rounded tummy.
The placenta by this time is fully formed, protects the fetus from infections and serves as a transmitter of nutrition and oxygen from the mother's body.

16 weeks is a special period in the development of a child, since the thymus gland is formed in him - this is a temporary organ that gradually, over 30 years of life, disappears in all people. In addition, the brain is actively developing, and the bones begin to accumulate calcium.

At seventeen weeks, some mothers will notice that their shoes have become small or narrow. This is due to swelling of the legs. temporary phenomenon.
The fetus develops the rudiments of molars. He already has tactile sensations, touch. Therefore, he likes to feel his body.

18 weeks is the ideal time for a second ultrasound screening. The baby is already large and most of the markers of chromosomal abnormalities are visible. Almost all women already feel fetal movements and it is at this time, on ultrasound, that they will find out who they are waiting for - a boy or a girl. The approximate height of the fetus is 20 cm, and its weight is close to 400 grams.

The baby is becoming more and more like an ordinary newborn, however, very small and thin. At nineteen weeks, he is already swallowing amniotic fluid and urinating in it. Spinning in the uterus with might and main. Can daily change head position to transverse or pelvic. At this time, doctors do not pay attention to the presentation of the fetus.

Twenty weeks of gestation is marked by an improvement in the child's hearing. He quite clearly, as far as possible, hears the beat of the mother's heart and her voice. You can understand how a child hears if you completely lower your head into the water and ask someone to say something. That's how he hears through the amniotic fluid. And yet, this is the period when the fetus reaches a weight of 500 grams, and if he is born now, doctors will be required to fight for his life.

By the 21st week of pregnancy, the fetal heartbeat is easily heard using a special wooden tube - an obstetric stethoscope. The baby continues to grow. Fat is deposited around his organs. This is necessary for their normal functioning after birth.

At 22 weeks, the weight of the fetus is about 700 grams, and the height is 22 cm. An intrauterine day regimen is being formed. Usually the baby at this time sleeps during the day, involuntarily rocked by his mother, and is awake at night.

By twenty-three weeks, the baby's hearing has improved so much that he can distinguish between familiar and unfamiliar voices. The vocal cords are formed, and subcutaneous fat is deposited. If you now do a three-dimensional ultrasound, you can clearly see the face of the child and understand which of the parents he looks more like.

At 24 weeks, the baby can distinguish between light and darkness, reacts to flashes of light. But the eyes are still devoid of pigment. It will show up in about a month. But the final color of the eye will be formed only 4-6 months after birth.

At 25 weeks, the weight of the fetus approaches one kilogram, and the height is about 40 cm. In the future, the baby will not grow so actively in length, at birth, full-term babies have an average height of 50-55 cm, but in weight they will gain at least 1.5-2 kg.

At the 26th week of pregnancy, the hair of the fetus acquires an individual shade, they are no longer snow-white. The lungs are actively developing, but if the baby is born now without medical preparation (dexamethasone injections to the mother), then he will be able to breathe only on a ventilator.

At twenty-seven weeks, the fetus occupies the entire uterine cavity, therefore it is less likely to turn upside down and back. Nevertheless, it is too early to worry about his presentation. By the way, the doctor can easily determine the position of the fetus at this time by palpating the belly of the pregnant woman on the couch.

If you do an ultrasound at the twenty-eighth gestational week, then mommy can see how her baby sucks her thumb! This habit will remain with him even after birth. The sucking reflex is very important for the first months of a baby's life. And the fetus has learned to cry, and sometimes real tears flow from its eyes!

At 29 weeks, the weight of the fetus is approximately 1.5 kg, and the height is about 45 cm. No special organ development occurs anymore. In fact, only the lungs develop. They form a surfactant - a substance that will not allow them to stick together after birth.

Thirty weeks is the ideal time to complete the mandatory third ultrasound. The doctor looks at how and how accurately the child is developed, whether the uterine-fetal blood flow is in order, whether there is enough amniotic fluid. And also, puts the approximate weight of the fetus. Depending on these data, it can be assumed whether there is a trend towards the birth of a large child.

At 31 weeks, the fetus is so developed that it is able to see and hear well. True, in utero, his eyes are almost always closed, since keeping them open in the water is not very comfortable. In boys, the testicles descended into the scrotum. And the appearance of the genitals in girls became common - the large labia covered the small ones.

The next week, the fetus has a jump in the development of the immune system. She actively produces antibodies. The adrenal glands also function, which form a steroid hormone.

At 33 weeks, the baby weighs about 2400 grams, almost like full-term. And, most likely, he will be able to breathe on his own if he is born at this time. However, while he is immature, and mommy should try to "hold on" for at least another 3 weeks.

Next week is the beginning of the last month of pregnancy, the eighth. The weight of the fetus is approximately 2700 grams, and some babies have already gained 3 kilograms each. The bones on the baby's head are movable to make it easier for him to be born. Almost all the children lay down with their heads down. But even if the baby is in a breech presentation at this time, there is still hope for his coup, if there is not too little amniotic fluid.

Thirty-eight weeks from conception or forty obstetric weeks - the first day of this week - the expected date of birth, set by the doctor based on the first day of the last menstrual cycle. The weight of the fetus is already more than 3 kg or even more than 4 kg.

Some women go into labor at 39 weeks. More often these are those who ovulated a little later than the standard 12-14 days of the cycle. At the same time, babies are born at a completely normal weight. If the fetus feels good on ultrasound, actively moves, the woman’s cervix is not “oak”, she is placed in a hospital and waiting for the independent onset of labor.

40 weeks of pregnancy from conception or 42 obstetric, the last one that doctors can give to wait for the onset of labor. But more often this week they are stimulated.

Pregnancy is a long-awaited and desired event for many women. And now it will be interesting for you to find out everything about your situation: how pregnancy develops by weeks, what happens in the body. And it is with the help of the pregnancy calendar that you can do this very quickly and easily.

Pregnancy Calendar is a convenient and useful service for future parents of moms and dads, which will tell you in great detail about pregnancy by weeks. He can be your companion throughout the entire period of pregnancy up to the birth itself.

Pregnancy is divided into 3 trimesters:

First trimester - 1-13 weeks after conception
Second trimester - 14-26 weeks
Third trimester - 27-40 weeks

How does the fetus develop during each trimester? Our pregnancy calendar will give you the answer.

Why you need a pregnancy calendar

The pregnancy calendar will tell expectant mothers about how their baby changes and grows at one time or another, how its organs develop, how the baby gains weight. Our pregnancy calendar will tell you what to do and what to abstain from at each stage of pregnancy, which doctors to visit, how to eat and what lifestyle to lead so that your baby is born healthy.

Also, our online pregnancy calendar will help you find out in which week with the help of ultrasound you can determine the girl you have to be born or the boy.

It is this weekly pregnancy calendar that gynecologists use when determining the age and development of the fetus. But there is also the age of the fetus, which differs from the menstrual period of pregnancy by 2 weeks.

In addition, this online pregnancy calendar allows expectant mothers to communicate and share their feelings and impressions with friends in an interesting position every week of pregnancy. Leave your comments and you will find out who has the same feelings and what they can mean.

But you need to know that the body of each pregnant woman is different, and our calendar does not take into account the individual characteristics of the menstrual cycle, so the calendar contains general information for everyone. All dates are approximate, as the length of the menstrual cycle varies from woman to woman and can vary, as a rule, from 24 to 36 days. In addition, you need to take into account the fact that the cycle may be irregular.

Reviews

Galina Chalay
I approached the moment of conception very consciously and, of course, I take my pregnancy responsibly. It is very important for me to know what happens to the baby at each stage of his development. After all, from the moment of conception, he is my child, whom I must take care of. Therefore, I always look with pleasure at the pregnancy calendar and read how my son lives in my tummy.

Natalia Semerichko
For me, the most important thing was that by reading about my week of pregnancy, I could chat on the forum and discuss feelings with other expectant mothers who are at the same time.

Maria Krylova
This calendar helped me learn a lot of useful information about my future baby. During this period, I was most interested in how he was in my tummy. After all, this was my first pregnancy. Very convenient and helpful service. Thank you very much!

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