The development of the fetus by week of pregnancy. Fetal table

The article will tell about the standards of growth and development of the child from conception to the moment of birth.

Pregnancy - The most natural state of the woman, which is granted to her by nature. When a new life develops inside, it is impossible to convey sensations of absolute happiness And boundless tenderness for the little miracle living inside you. But at the same time, some anxiety appears: is everything good in the baby, is it comfortable in his mother’s tummy, how its development occurs And how he looks. These exciting issues will be discussed in this article.

Pregnancy in weeks Development and sensation. The first move of the fetus

The first weeks the origin of life in the uterus and the transformation of the embryo occurs for a woman unnoticed, but at this extremely important moment occurs fertilization And swift cell division. A multicellular organism is formed from a fertilized egg, which is lowered into the uterus and there is attached to its walls.

Evolution

In the moment implantation (attachments) fertilized eggs can be small bloody discharge, which are considered physiological.

In the second week pregnancy from the multicellular organism is gradually separated placenta And the umbilical cord, a nervous tube is formed, which in the future will become a nervous system. Following this in the third week organs and systems are laid, and by the 21st day the life of the embryo begins to beat his tiny heart.

Rudiments of the intestines, lungs, kidneys and liver begin to form in the fourth week, and the heart rate by this period increases significantly, which helps to pump more blood. In the future baby, the beginnings of the brain in the form of a plate, spine, folds are outlined.

The first month of life

Since that time, a woman may experience:

• light dizziness
• nausea
• fatigue
• weakness
• increasing the sensitivity of the nipples
• change in sexual libido (increase or decrease in sex drive)

Already at this time, a pregnancy test can show a positive result.

Fifth week The second obstetric month of pregnancy begins. On this and subsequent sixth week Important processes for the formation of organs of the respiratory and digestive system, brain and heart chambers occur, pits appear, which in the future will become eyes and mouth, and fingers are outlined.

7-8th week

In the seventh week The formation of the umbilical cord ends and from this moment the uterine-placental blood circulation begins. The formation of the heart and other organs ends, the formation of a vestibular apparatus begins. The limbs of the future baby are already partially formed and he begins to make chaotic movements with them.

Woman in the eighth week Pregnancy can feel slight pain in the chest, abdomen and back, a sharp change in mood and taste preferences for food. At this time, the child’s face acquires familiar outlines, becomes distinctly distinguishable by the nose and eyes covered in centuries, and the mouth can open from time to time.

The third month of pregnancy It is characterized by a continuation of the development of the nervous system: the baby has the first reflexes (sucking), he performs various movements, so far imprisonment to mom due to tiny sizes. In the blood of crumbs, not only red blood cells are now present, but leukocytes also begin to appear. The first movements of the baby may be felt.

Usually, by the end of the third month The nausea and weakness in a woman should pass - the body is gradually adapting to a new state.

The third month of pregnancy

At the 14th week The baby's face is fully formed, and by the 16th week The kid begins to make grimaces: he can smile or frown, but this, of course, is an unconscious facial expressions. Fingers that begin to acquire an individual pattern are also fully formed.

In the fifth month Pregnancy, including 17-20 weeks, begins the formation of subcutaneous fat, but blood vessels continue to be shone through the skin, giving it a pink-red tint. The baby's heartbeat begins to listen to the stethoscope, thanks to the distinctness of his blows.

A pregnant woman can feel dizziness, colostrum stands out from her nipples, urination is more frequent.

Pregnancy development calendar for weeks (second half of the term)

In the sixth month, the baby’s jump in the development begins:

• parts of the body become more proportional
• the spine is fully formed
• the brain completes the formation of nerve cells (its weight - 100 g)
• the kid takes the entire volume of the uterus
• the child feels mom's emotions

In the sixth month A woman can feel pregnancy the first move fetus.

From 25 to 28 weeks The seventh month of pregnancy is coming. The baby becomes practically capable of independent life - he ends formation of all organs and systems. Fat tissue continues to accumulate, fluff begins to fall out, and eyebrows and eyelashes become darker. It is during this period that one of the hemispheres of the brain begins to dominate.

A child born in the 32nd week

From 29 to 32 weeks The improvement of the crumbs continues. He begins to occupy the entire space of the uterus and, due to crowding, takes a pose traditional for kids. Endocrine system The child is strengthened by hormones, and his skin brightens, the folds completely disappear.

An enlarged uterus squeezes the woman’s internal organs because of this can annoy heartburn, difficulty breathing and back pain.

Beginning from 33 weeks The formation of alveoli in the lungs almost completely ends. The child is preparing for a non -industrial life, his brain is fully formed, the skin becomes lighter and smoother. Baby occupies its final position In the uterus. By the end ninth obstetric month The bones of the skull remain soft, unlike other bones, which contributes to their convergence when moving along the birth canal.

38th week

From 38 weeks The kid is completely ready for life outside the womb. It can capture sounds, distinguish between taste and bright color. The space of the uterus becomes cramped for the crumbs, it lies motionless in one position. By 40 weeks Fatty tissue continues to increase and overstrown of pregnancy can turn into difficult birth.

A woman can feel pain in the abdomen and back, the uterus often comes into tone, and the so -called harbingers of childbirth indicate a imminent approximation of the baby's birth.

40th week

The weight and norms of the fetus by week of pregnancy. Length, fetal growth in weeks

The weight of the fetus -An important indicator that indicates the correct harmonious development of the baby and whether any negative factors affect him. Active growth of crumbs In the womb, it can talk not only about sufficient nutrition, but also a full -fledged oxygen intake. If the weight does not change, then this may indicate the death of the fetus so called frozen pregnancy.

The norms of the fetal increase in weeks are given in the table:

Weight by week

Know the weight of the child is necessary in order to at the last weeks plan childbirth - If the baby is too large, then the question is raised about the impossibility of natural delivery and then resort to an operation called c-section. The approximate weight of the fetus can be installed in volume of the abdomen, as well as during ultrasound and correlated with the fetal standards in weeks.

The size and increase of the fetus by week

During pregnancy, changes in the baby occur every day: he it grows in length, gains weight, its organs and systems develop. With the help of ultrasound you can find out the growth of the childWhich, like weight, is indicative of the development of crumbs: if any factors interfere with the development, then there will be no growth that would be close to normal. Among these factors are highlighted insufficient nutrition of the baby, violation of the flow of oxygen due to smoking of the mother or drinking alcohol.

Length, fetal growth in weeks does not always match the tabular data. It is important to consider the individual characteristics of the child, if his mother or father of low stature, then the child will most likely be stunted. But still write off all deviations on individual characteristics Not worth it, and invariable measurement results can indicate a frozen pregnancy.

With the help of ultrasound you can measure the height and weight of the childWhat will help establish a week of pregnancy and the alleged date of birth.

Fruit head circumference by week

The child is in the womb It grows unevenly - During his evolution, there are jumps and slowdown, which are considered the norm at a certain period, and on another - anomaly of development. The growth of the circumference of the head also occurs abruptly. The most stormy growth of the baby's head occurs in the second trimester, between 15 and 26 weeks, when the volume of its circle increases by 11-13 mm.

The norms of the head of the head

In the third trimester The growth of the head of the head slows down and by the end of pregnancy changes on average to 12-15 mm. This is due to the fact that in the middle of pregnancy there is an active development and growth of the brain of the child.

Fruit heartbeat by week. The rate of the fetal heartbeat by week

In the fourth week pregnancy begins its formation heart. Improving, it makes its first shocks at 5 weeks development, but you can register them using ultrasound equipment only 6 weeks after conception. At about 19 weeks, the heartbeat can be listened to in a stethoscope at a planned examination.

Heartbeat standards

The rate of the fetal heartbeat by weeks is given in the table:

If when listening is found Heart rate above 200 beats or below 85, this indicates adverse factors affecting the child. If a after 8 weeks it is not possible to catch pregnancy with distinct heart rhythms, it is assumed that the pregnancy is frozen.

Cerebellar of the fetus by weeks (table)

During ultrasound, great importance is given brain structures, since any deviations found during uterine development indicate disappointing forecasts and certain pathologies. By using measurement of cerebellum A specialist can establish alleged genetic deviations and even the state of health of the baby as a whole.

The norms of cerebellar size

Development of twins by week

Pregnancy in which they live and develop in the uterus two children at once, in many ways different from a single pregnancy.

Firstly, this is a big responsibility for the mother herself, who should be treated with his health, and secondly, bearing twins is much more difficult for a woman and more dangerous for the kids themselves.

At an earlier pregnancy (in the first trimester) Identify twins on ultrasound It is much easier than at a later date, since the device determines only the baby who is closer to him.

Twins

The development of twins has the following features:

• on the 4 weeks Each of the kids weighs 5 g
• 25% twinsdevelop as mirror (one of the babies can be located on the left, and in the other on the right)
• the first movements You can already feel on 16th week
• on the 28th week the formation of lungs and crumbs is completed ready to extra -time life
• the weight twins at the end of pregnancy are significant less normbut this is not a threat to life
• if in the first trimester one of the fruits freezes, then there is a high probability the birth of one From twins
• when in the second or in the third trimester One of the kids dies, then, as a rule, such a fate is waiting for the second child

Video: multiple pregnancy

The location of the fetus in the abdomen by weeks

In the first and second trimester The kid in the uterus moves randomly and occupies the most convenient position for him, which does not affect the health of a woman. But in the third trimester, the position of the crumbs in the abdomen is of great importance, because it depends on this Can a woman give birth The child is on their own.

In the process of fetal growth, it becomes more closely and closer in the uterus, its movements are limited. Most pregnant women have already by 26-28 weeks The child occupies the final position in the abdomen, based on which one can judge the features of the delivery. The most successful for childbirth is head presentationWhen the baby’s head is near the small pelvis of the mother.

Head presentation

U 5% pregnant women observed Pelvic presentation fruit when the baby is located buttocks to the entrance to the pelvis. This position of the child can cause certain difficulties with his passage in the process of childbirth, often doctors recommend in such a situation c-section.

Natural birth with pelvic presentation They can be dangerous for the life of the mother and the baby.

Pelvic presentation

Fruit pictures by week

Embryo from the moment of fertilization to the 8th week

Fruit from 9th to 20th week

Development of a child from the 21st to the 32nd week

Kid from the 33rd week until the time of birth

The origin of a small life in the womb and its further development is a real miracle. Enjoy the unforgettable months of unity with the tiny, and thanks to the norms of weight and height, which can be compared with the ultrasound results, control the baby’s health.

Video: Development of a child in the womb: from conception to birth