Fetal development by week of pregnancy - step-by-step description of the main stages by day and week. 140 photos, diagrams and video descriptions

The pregnancy video guide, 40 weeks, is a series filmed with the support of the Pampers company, and tells in 40 episodes about all weeks of pregnancy. This is a wonderful immersion into the world of your child’s intrauterine development and assistance throughout your pregnancy. Watch an online pregnancy video guide, the best film about 40 weeks in Russia.

Video guide, 1 week, pregnancy planning

This series of 40 weeks talks about the importance of pregnancy planning, how to properly plan the birth of a child so that he is definitely born healthy. The first week of pregnancy is the time before conception. In fact, you are not pregnant yet.

Video guide, week 2, genetic testing

In this 40 week series, you will learn what genetic testing is and why it is done. You will learn how a geneticist predicts the health of an unborn child. Genetic testing is not carried out in all cases, but if pregnancy is planned, then it is worth consulting a geneticist, video of the pregnancy process .

Video guide, 3 week, pregnancy determination

This episode is 40 weeks, how do you know if you are pregnant? Pregnancy tests, how they work and how to carry them out correctly. We learn about pregnancy before visiting the doctor, learn to correctly evaluate a pregnancy test, pregnancy week by week video guide .

Video guide, week 4, how to tell your husband?

In this episode, you're 40 weeks pregnant, but you're faced with a problem. You don't know how to tell your husband about your pregnancy. The video guide will tell you how other women did it. You will also see the first stages of the child’s development and learn about how the onset of pregnancy can affect your well-being.

Video guide, week 5, registering

In this 40 week series, you see your doctor for the first time. You found out about your pregnancy, and it’s time to go to the antenatal clinic. You are about to find out what awaits you at your first visit to the gynecologist about pregnancy. What studies and tests will you have to undergo? Pregnancy video guide .

Video guide, week 6, side effects

In this 40 Weeks series, you'll learn about side effects during pregnancy and what can help you feel better. They will tell you how to deal with early toxicosis and how to more easily survive the first difficult months of your pregnancy, 40 weeks diaper .

Video guide, week 7, ectopic pregnancy

In this 40 weeks series you will learn about what an ectopic pregnancy is and why it is dangerous. What symptoms can an ectopic pregnancy have? Every pregnant woman should know about this. This will not necessarily happen, but if it suddenly happens, you will seek help in time, video 40 weeks.

Video guide, 8 week, physical education during pregnancy

This episode is 40 weeks, exercise during pregnancy. What exercises will not harm your baby and is it possible to continue playing sports? About the role of physical exercise in the normal course of pregnancy and childbirth, video guide to 40 weeks of pregnancy .

Video guide, week 9, nutrition at the beginning of pregnancy

This 40 week series will tell you about nutrition at the beginning of pregnancy. This is very important, especially considering the characteristics of the condition and, as a rule, lack of appetite. How to eat so that your baby gets everything he needs, 40 weeks diaper video .

Video guide, week 10, mood swings

In this 40-week series, you will learn what your emerging emotional lability means and how to avoid conflicts. All women experience mood swings in the early stages, why does this happen and how to deal with it? Pampers pregnancy video guide .

Video guide, week 11, first trimester screening

This series is 40 weeks and you are scheduled for a first trimester screening. Pregnancy by week ultrasound video . Why is a fetal ultrasound performed and why tests are necessary. The importance of the first examinations and how their results can affect the further course of your pregnancy, the course of pregnancy video .

Video guide, week 12, miscarriage

In this 40 Weeks series, you will learn about the symptoms of miscarriage. A miscarriage is the intrauterine death of the fetus and its expulsion from the uterus. Why miscarriages happen in the early stages and how to survive it. Will a miscarriage affect your health? 40 weeks watch .

Video guide, 13 weeks, sex in early pregnancy

In this episode of 40 weeks, they will tell you about sex in early pregnancy. Is it dangerous and is it possible to continue the marital relationship if you are pregnant? How to maintain sexual harmony if you feel unwell or sex is contraindicated for you, film 40 weeks .

Video guide 14 weeks, pregnancy and toxins

This 40 week series looks at how toxins can affect a baby's development. They will tell you how you can protect your baby from the harmful effects of toxins in water and food. You will learn what you should eat and drink, how to spend time so that the fetus develops healthy, watch 40 weeks online .

Video guide, week 15, changes in appearance

In this episode, 40 weeks, your appearance changes due to the onset of pregnancy. You may feel uncomfortable with these changes. What should you expect? How to prevent unwanted changes, such as stretch marks, 40 weeks pampers .

Video guide, week 16, second trimester screening

In this 40 week series, you will learn about second trimester screening. At this stage, when performing an ultrasound, the doctor can already tell you the sex of the fetus. If the results of research and analysis are not very encouraging, what awaits you and your child next? Diaper video guide 40 weeks .

Video guide, 17 week, amniocentesis

In this 40 weeks series, you will learn about why a procedure such as amniocentesis is performed and who is prescribed it. They will show you exactly how it is carried out and whether there is a risk for the child in this study. What happens if you are prescribed amniocentesis? Video guide to pregnancy in Russian .

Video guide, week 18, going on vacation

There are 40 weeks in this series. Can pregnant women go on vacation? They will tell you whether pregnant women can sunbathe, swim, or fly on an airplane. How to make your trip as comfortable as possible and what you should take with you, pregnancy video .

Video guide, 19 week, pregnancy and superstitions

There are 40 weeks in this series, how to deal with superstitions? Pregnancy is surrounded by many signs and superstitions, prohibitions on certain actions. Does this make sense and how should we approach it? Should we believe folk superstitions? Pregnancy by week video.

Video guide, 20 week, lifestyle during pregnancy

This series is 40 weeks, pregnancy will inevitably affect your lifestyle. We buy new clothes and have a good time. Pregnancy does not mean that you should experience discomfort and any restrictions. Pampers pregnancy video guide.

Video guide, 21 weeks, informing your boss about pregnancy

We're 40 weeks into this episode, and if you haven't told your boss yet, it's time to do so. Why is it important that your superiors find out about your interesting situation as early as possible and what benefits the legislation has in store for pregnant women, pregnancy by week 3D video.

Video guide, week 22, yoga

This episode is 40 weeks, yoga during pregnancy. How does yoga affect the health of the expectant mother and her child, and how can it make subsequent births easier? Is yoga accessible to everyone during pregnancy? Pregnancy and childbirth video .

Video guide, 23 week, nutrition during pregnancy

In this 40 weeks series you will be told about the main features of nutrition during pregnancy. How to eat right to avoid anemia and other problems during pregnancy. Video guide to 40 weeks pregnancy .

Video guide, week 24, courses for pregnant women

In this 40 weeks series, you will learn about why you need to take pregnancy classes, and why you should do it with your husband. They will help you learn how to choose the right courses for pregnant women, and explain what exactly such courses give pregnant women, 40 weeks video guide .

Video guide, 25 week, sex during pregnancy

You're more than halfway through this 40-week series, and now your expanding belly may be causing you to question whether you can have sex. You will be told about how pregnancy affects sexual relationships and how you should approach sex. Film 40 weeks pregnant .

Video guide, 26 weeks, baby learned to hear

This 40 Weeks series will teach you how to communicate with your unborn baby. From this week of pregnancy, the baby can already hear your voice, and it is very important for him that you talk to him. Find out how your baby reacts to sounds , 40 weeks pregnant video .

Video guide, 27 weeks, unpleasant companions of pregnancy

In this 40 weeks series, you will learn about all the dangers and troubles that can happen in the second half of pregnancy, they will tell you what late toxicosis and edema are, and how premature labor begins. This doesn’t have to happen, but it can happen and you should be prepared, pregnancy video for free .

Video guide, 28 weeks of pregnancy, partner birth

In this 40 Weeks series, you will learn about what partner birth is and how your husband can help you during childbirth. How does partner childbirth affect intrafamily relationships, and should we be afraid of them? Ultrasound video during pregnancy .

Video guide, week 29, collection and storage of umbilical cord blood

This 40-week series covers what umbilical cord blood is, how it is collected, and why you should preserve stem cells. Is it possible to agree in advance that your child’s umbilical cord blood will be collected and stored for him, pregnancy video online .

Video guide, week 30, fighting fatigue

There are 40 weeks in this series, you are already tired, you are tormented by a large load on your back, and it is becoming more and more difficult to move every day. What kind of support can your loved ones give you and what should you do in order to bear the increased load more easily, pregnancy and childbirth video for free .

Video guide, 31 weeks, visiting the pool

This series includes 40 weeks of swimming and aqua fitness. What benefits do exercises in the pool give a woman, how water affects your condition, and how exercises in the pool will affect the course of your labor. About all the benefits of water aerobics. Development of pregnancy video .

Video guide, 32 weeks, future dad

This episode covers 40 weeks, everything a future dad needs to know. The series was filmed specifically for men, and it’s worth watching together. How men perceive their role in pregnancy and childbirth, how they can help their wife cope with this difficult task, 3D pregnancy video .

Video guide, 33 week, possible complications

This 40 Weeks series will tell you about possible complications in late pregnancy. If your baby is born now, he will need the help of doctors, but he will definitely cope and grow up healthy. How to avoid complications? Pregnancy and sex videos .

Video guide, 34 weeks, tour of the maternity ward

In this 40 week series you will take an unusual excursion that is almost impossible in real life. They will show you the maternity ward and tell you about where and how your birth will take place, what conditions you will be in, watch the pregnancy video for free .

Video guide, week 35, pain relief during contractions

This 40 week series covers techniques for relieving the pain of contractions. You will learn that pain during contractions is normal and can be relieved with both special breathing techniques and medication. There is no need to be afraid of this pain, pregnancy timing video .

Video guide, 36 week, preparing for the trip to the maternity hospital

In this 40 weeks series you will learn what to take with you to the hospital. They will tell you how to properly prepare bags for the maternity hospital and what you and your baby may need there. Now childbirth can begin in the near future, everything should be ready, watch pregnancy videos online .

Video guide, 37 week, Apgar scale

In this episode, 40 weeks will show a newborn immediately after birth and you will learn exactly how doctors assess his condition. How to find out how your child survived the birth. For this, there is the Apgar scale, which evaluates the main signs of a child’s vital activity, pregnancy video in Russian .

Video guide, 38 weeks, breastfeeding

This episode is 40 weeks, breastfeeding. How to properly attach a baby to the breast, how he should latch on the breast so that you avoid painful cracks and lactostasis. Valuable tips on breastfeeding, pregnancy process video .

Video guide, 39 weeks, beginning of labor

This series covers 40 weeks, what is the difference between false contractions and true ones, and when is it time to go to the hospital. You're about to give birth, how do you know when labor is starting? What are Braxton-Higgs contractions and what to do when amniotic fluid ruptures, video of how pregnancy occurs .

Video guide, 40 weeks, birth

There are 40 weeks in this series, the day has come for the birth of a new person. They will show you childbirth, how the birth of a child occurs. This is a beautiful final film of the video guide, from it you will learn how to behave during childbirth so that everything ends well, video pregnancy calendar .

There is heated debate around the question: is it possible to do an ultrasound at such an early stage?

The fact is that an ultrasound examination will most accurately determine whether a new life has arisen in a woman’s body. But is a reliable result worth exposing the embryo to danger once again? Many women, and even doctors, are in no hurry to conduct such studies, especially taking into account the fact that a woman’s condition can be determined by other signs. At this stage, most women are already experiencing obvious and unpleasant symptoms of pregnancy: nausea, heaviness in the lower abdomen, hypersensitivity of the breasts, which seem to “swell” and ache. The belly is still practically invisible, and in extreme cases it adds 5 extra centimeters, which can only be a consequence of a passion for sweet and starchy foods.

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The emotional state of a woman at 4 weeks

At 4 weeks of pregnancy, a woman’s emotional state resembles a roller coaster: in a matter of minutes she can go from sobbing “for the bird” to homeric laughter. Even the most reserved ladies become emotional, irritable and impressionable.

At this time, a man needs to be patient and treat his beloved with understanding. Understand that the expectant mother has not gone crazy and has not turned into a hysteric. It’s just that hormones staged an emotional revolution in her body. Surround the woman with attention, show care and concern in order to receive only gratitude and unbridled love.

Second and third trimester of pregnancy

The child continues to grow and bile is already being produced, the urinary system is functioning, the heart and blood vessels are working.

  • 13 weeks. From this moment on, protection in the form of the placenta is added; it protects against unwanted influences.
  • 14 weeks. The eyes are covered with eyelids, they will remain in this state for another three months.
  • 15 weeks. The soft ears are modified to a normal silhouette, the legs and feet have grown noticeably.
  • 16 weeks. Nothing yet interferes with the free movements of a child weighing 120 grams.
  • 17 weeks. The glands that lubricate the skin with a sebaceous layer are already working. Soft hairs are visible on the body.
  • 18 weeks. Fatty tissue is formed under the skin.
  • 19 weeks. Inside the intestines there is something like feces with bile.
  • 20 weeks. The endocrine system begins to work, and a more intense heartbeat is heard. Such a child, if it had to exist outside the womb, could produce breathing.
  • 21 weeks. The body is actively growing. At birth at this stage, there is a high probability of fetal survival, subject to the availability of professional supervision and special devices.
  • 22 weeks. Fat deposition and weight gain continue to occur.
  • 23 weeks. The baby is about 32 centimeters tall and weighs no more than 650 grams.
  • 24 weeks. At the end of the sixth month, the weight reaches 900 grams.
  • 25 weeks. A rapidly growing child is able to distinguish voices and hear the mother’s heartbeat.
  • 26 weeks. Preparations are underway to leave the uterus. The child tries to open his eyes a little; his height is approximately 40 centimeters.
  • 27 weeks. Eyelashes have grown. There is a high probability that the fetus is already positioned head down.
  • 28 weeks. Weight has gained more than a kilogram, the skin is all wrinkled.
  • 29 weeks. In the womb there is a one and a half kilogram baby with thick hair.
  • 30 weeks. The fetus will now live in somewhat cramped conditions due to weight gain.
  • 31 weeks. By the middle of seven months, a two-kilogram baby is already in the womb.
  • 32 weeks. At this time, the nails reach normal length, the skin is smooth and pink.
  • 33 weeks. The fluff is gradually coming off the expanding body.
  • 34 weeks. The eighth month is coming to an end, and it can almost be said that the weight reaches more than two and a half kilograms.
  • 35 weeks. At this age, the child is able to tenaciously grasp objects, his limbs are in a bent state.
  • 36 weeks. The foot lengthens, the toenails are completely retracted, the body is no longer covered with wrinkles, the ears harden, and in most cases a sucking reflex is formed. When born, the baby is already capable of screaming loudly.
  • 37 weeks. Parietal-sacral height is 35 centimeters.
  • 38-40 weeks. The ninth month has ended, babies most often at this stage weigh about three and a half kilograms (at least two and a half kilograms), height is more than 52 centimeters (at least 47 centimeters).

14 week 18 week 20 week 33 week
A child who has lived inside the uterus for forty weeks has every chance of successfully passing through the birth canal and feeling great outside next to his mother.
Normally, such a baby, just born, shows high motor activity, screams loudly, opens his eyes, and is able to intensively suck his main food - milk.

What does a baby look like at 4 weeks pregnant?

At 4 weeks of pregnancy, doctors do not even call the baby a fetus, but a rudimentary disc, since it has an almost flat shape.

This is only an embryo consisting of three “layers”. Subsequently, internal organs, the heart, muscles, skin, hair, teeth and the central nervous system will be formed from these “layers”. At week 4, a blood supply begins to form in the embryo, which is already located deep in the wall of the uterus.

The embryo is so fragile that any negative factors: stress, exercise, antibiotics, alcohol or illness can cause a miscarriage. Therefore, by this time it is already necessary to give up active sports, closely monitor your health and switch to proper nutrition.

First trimester of pregnancy

After fertilization, the embryo constantly increases in size due to the active process of cell division and purposefully moves through the tube in order to safely enter the uterine cavity.

  • 1 Week. The first week ends, at which time the unborn child reaches the uterus and attaches itself to its mucous interior.
  • 2 weeks. In the second week, the cavities are already ready for the growth of organs in them.
  • 3 weeks. After the third week, the heart starts up and the spine begins to form. At the same stage, arms begin to grow and muscles begin to form.
  • 4 weeks. A four-week embryo, having grown to 4 millimeters, begins to change, it increases in size, and it is at this time that the basic tissues are formed. The body is protected by skin, there is already a head with a looming face, although the arms and legs are still indistinguishable.
  • 5 weeks. Muscles, respiratory organs, circulatory system, nervous system and many important organs - everything is improved. The placenta begins to grow.
  • 6 weeks. The three-gram creature has more clearly visible limbs, has a cartilaginous skeleton and teeth. The thymus gland, the entire endocrine system, the genitals continue to grow, blood circulation changes.
  • 7 weeks. A seven-week-old baby measures about two centimeters, his fingers are separated, and his hearing organs are growing. This person weighs only five grams, but his existing organs are already working.
  • 8 weeks. An eight-week fetus weighing no more than 10 grams has a changed face, organs and systems undergo metamorphosis, and the immune system works. The placenta is not functioning, but is already preparing to fulfill its tasks.
  • 9 weeks. The child, who no longer has a tail, continues to develop, organs change, the neck stands out, the weight is now equal to 12 grams, and the dimensions are approximately 6 centimeters.
  • 10 weeks. The fetus' motor activity increases, its size is 7 centimeters, its weight reaches approximately 15 grams. There is an addition of reflexes for swallowing and grasping.
  • 11 weeks. The term is moving towards the end of the first trimester, height is 9 centimeters, weight is around 20 grams. The bones harden, the head is proportional to half the body.
  • 12 weeks. The genitals are clearly visible, the face is clearly formed, and the body systems are working.

6 week 8 week 10 week

What is more convenient to calculate the duration of pregnancy: by weeks or months?

Despite the fact that doctors count pregnancy by weeks, women try to know the age of the baby in months. In this case, it should be taken into account that the obstetric month is not equal to the calendar month. A calendar month has four weeks and two days, and the first month of pregnancy consists of six weeks.

Thus, it turns out that two months of pregnancy is eight weeks and six days, three months is thirteen weeks and two days, four months is seventeen weeks and five days, five months is twenty-two weeks and one day, six months is twenty-six weeks and three days, seven months - thirty weeks and six days, eight months - thirty-five weeks and four days, nine months - forty weeks.

Recommendations for the expectant mother at 7 weeks of pregnancy

Many women in the second month of pregnancy experience the following physical and mental phenomena:

  • nausea, vomiting, excessive salivation;
  • constipation;
  • heartburn, indigestion, bloating;
  • lack of appetite and eating habits typical of pregnant women;
  • changes in the mammary glands: they have enlarged, become heavier, tense, the rim around the nipple has darkened; nodules appeared around the nipples - protruding sweat glands; a network of blue lines under the skin is clearly visible, indicating which way the blood enters the chest;
  • recurrent headaches;
  • periodic fainting and constant dizziness;
  • the abdomen may become enlarged, which is caused more by stretching of the pelvic bones than by the growth of the uterus;
  • the appearance of mood instability, which manifests itself in irritability, incontinence, tearfulness;
  • anxiety, fear, joy, emotional uplift.

Registration at the antenatal clinic

Registration at the antenatal clinic will take a long time: at the first visit, the doctor will ask you many questions about your health, lifestyle, heredity and much more. Your answers will be recorded on the card and will allow you to assess the possible risks of your pregnancy. In addition, you will need to undergo many tests:

  1. Vaginal smears for infections.
  2. Blood test for syphilis (RW), HIV, antibodies to hepatitis B and C (from a vein).
  3. Blood test for blood group and Rh factor (from a vein).
  4. Clinical blood test (finger prick). It will show whether the expectant mother has anemia or inflammatory changes in the blood.
  5. Biochemical blood test (from a vein). It will help to find out whether there is enough protein, glucose and other substances in the blood of a pregnant woman that are necessary for the proper development of the embryo (fetus).
  6. The study of blood clotting factors is otherwise called a coagulogram (from a vein). Its results will show whether the expectant mother has blood diseases that impair clotting. Doctors need to know this, since low coagulability is fraught with complications or even termination of pregnancy (as a result of bleeding or premature placental abruption), and high coagulability leads to slow movement through the vessels, which can harm the baby.
  7. General urine analysis. It will provide information about the density and composition of urine, which will help rule out kidney problems or diabetes.

Read more about visiting an antenatal clinic during pregnancy in this article.

Lifestyle of a pregnant woman in the first trimester

It is still important to follow the recommendations for the first weeks of pregnancy. If you have not yet quit smoking, give up this bad habit immediately. Smoking interferes with the access of oxygen to the embryo, which leads to developmental abnormalities, a tendency to diseases of the heart and respiratory system, and several times increases the risk of premature birth and even death of the child. Read more about the effects of smoking on pregnant women and the fetus here.

Unpleasant sensations during pregnancy

During the nine months of pregnancy, the expectant mother may be tormented by various unpleasant sensations: toxicosis, hemorrhoids, swelling, heartburn, varicose veins, cramps and other problems. Some women experience pregnancy easily, while others have a more difficult time. In many cases, discomfort can be reduced or even eliminated altogether. Read about what problems expectant mothers face and how to deal with them.

"6th week of pregnancy 8th week of pregnancy"

Obstetric and embryonic gestational age

Therefore, calculations are usually made from the first day of the last menstruation. There are obstetric and embryonic periods. Many women do not understand them and this leads to confusion.

The obstetric period involves calculation from the first day of the last menstruation. It is this data that will be entered into the patient’s card, from which sick leave will be calculated, all necessary tests will be completed, as well as the date of the upcoming birth. Its duration is ideally two hundred and eighty days. Although in practice it can often change in one direction or another.

The embryonic period is fifteen days shorter than the obstetric period. It is counted from the day of ovulation. The first day of the last menstruation is taken into account, two weeks are added to it and the day of ovulation is obtained. This day is considered the beginning of the countdown. Although, of course, this is not entirely correct. Conception may not occur on this day, and the timing of ovulation is different for each woman and does not always correspond to two weeks from the first day of the cycle. In addition, ovulation often lasts not one day, but several.

In addition, it is necessary to take into account the vitality of sperm in the female body. They do not immediately meet the egg after entering the female body. It takes time for them to travel from the vagina through the fallopian tubes to the uterus. Sometimes this can take up to a week. Therefore, this calculation is not reliable.

What is important in the first weeks for a pregnant woman?

Considering the difference in female bodies, some find out about fertilization only when menstruation stops and that’s it, no symptoms. But others know this almost from day one. So, the first weeks of pregnancy are different for everyone.

It happens that a woman does not understand her fatigue and increased drowsiness. And then, a little later, she finds out that she is pregnant. This occurs due to a restructuring of the hormonal system.


During this period, all processes occurring in the body require energy, which the expectant mother simply does not have enough.

Mood swings, irritability, heightened sense of smell - all this is normal. Some people are subconsciously afraid of responsibility for their unborn baby, others stop perceiving the smells of perfumes and flowers that they liked just yesterday.

For others, the sight of certain foods triggers a gag reflex. The main thing is to try to calm down yourself and not give your loved ones a reason to worry.

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