Edema of the fetus in the womb
The appearance of a child in the light is a real miracle. At first glance it seems that after reading the book you can understand the features of conception and the stage of development of the child in the womb of the mother. But in fact, it is extremely difficult to fully appreciate and understand all the subtleties of this process.
Nature thought out every moment of the growth of the baby from the fertilization of the egg before his birth. It is useful for every woman to know what happens to the fetus and to her body during the period of bearing the child.
Development of a child in 1 trimester
Strangely enough, the first trimester is the mostimportant, because for three months is the laying of all internal organs in the embryo. A woman experiences great changes in her health, since the altered hormonal background affects not only the sexual organs, but also other systems of the body. The most interesting moments occur during this period with the fruit, because after the first trimester, a whole organism is formed from one small cell, though not yet able to exist separately from the mother.
Fertilization of the egg often occurs inmiddle of the cycle. This process involves the fusion of an egg and a sperm, each of which has half the genetic set - 23 chromosomes. From this moment begins the development of the child in the womb of the mother. The process of cell division is programmed at the genetic level. Therefore, by the time the egg reaches the uterus, it already has a sufficient number of cells performing different functions.
Journey through the fallopian tube usually takesabout 7 days from the moment of fertilization. Once in the womb, the egg looks for the most convenient place to attach. Gradual introduction into the endometrium occurs at the third gestational week of pregnancy (from the beginning of the cycle, and not from the moment of fertilization). By this time, the embryo has a length of 0.15 mm, (approximately with a pinhead), and its weight is 2 - 3 μg.
After attaching to the wall of the uterus cells of the fetusbegin to quickly share. Some of them are transformed into a chorion, a yolk sac and fetal membranes, and the other part will be the beginning of a small organism. By the 5th week of pregnancy there are significant changes in the development of the baby - he has already formed a heart and it began to beat. There is also a laying of the nervous system and organs responsible for hematopoiesis. At the end of 6 weeks, the embryo can distinguish between the brain, which looks like an extension of the neural tube. Also there are rudiments of handles and legs, visual blisters with pigmentary disks are formed. The weight of the baby is about 0,9 - 1,3 gr. and its length is 3 - 5 mm.
If the future mother will go on ultrasound at week 8the doctor will let her listen to the heartbeat of the fetus. By this time it can be distinguished by a good ultrasound machine with Doppler. The internal organs of the baby on ultrasound are not yet distinguishable, but the embryo already has a digestive tract, a cardiovascular system is laid and the rudiments of bronchi appear. The placenta grows and soon it will take on the basic functions (gas exchange, nutrition of the fetus, maintenance of the hormonal background). By the 9th week there are rudiments of bones and joints are formed. The fruit weight is about 1 gram, and the height is 13 mm.
After 10 weeks of development endsembryonic and the fetal period begins. This is due to the fact that the baby is becoming more like a person. The nervous system starts impulses, but the truth they do not yet have an effect on the rest of the organs. The development of the child in the womb is accompanied by changes from the mother. She has heartburn, nausea, constipation and palpitations, but eventually these symptoms will necessarily pass.
Many women wait for 12 weeks of pregnancy. and it's not just that. In the second trimester, the threat of miscarriage is minimal, which allows them to calm down. The baby already weighs 20-30 grams, and the height is 80 mm. Planned ultrasound in this period must be passed necessarily, as it is necessary for the timely detection of developmental anomalies. By this moment the sexual organs of the baby are already beginning to form, but they can not be distinguished during the study. Fingers separate from each other, and bones and muscles become more flexible.
Child development in the 2nd trimester
The beginning of the second trimester says thata small life growing inside a woman, gaining strength and will soon be able to exist separately from her. The weight of the baby is still tiny, so his future mother does not notice his movements yet. But the reflexes of the fetus are becoming more accurate. He can cover his eyes with handles, if he puts light on the mother's belly or starts moving if he hears a strong sound.
About 14 weeks a special leap in developmentis noted from the digestive system. The baby begins to swallow the amniotic fluid. Blood cells appear in its blood vessels, and on the skin a fluff is formed. The weight of the baby is about 110 grams, and the height is about 12 cm. The stages of the child's development in the womb depend on the nutrition of the pregnant woman and the state of her health. If there are any problems, the height and weight of the child will be different.
In 16 weeks it is necessary to pass the second screeninga study of the blood of a pregnant woman for the timely detection of chromosomal diseases. Sometimes doing ultrasound, because by this time any deviations have already been seen, and you can determine the sex of the child. Gradual accumulation of subcutaneous fat begins. The head is still disproportionately large in relation to the body. At 18 weeks, it becomes possible to feel the movements of the fetus, as it becomes mobile. Now his life can be conditionally divided into periods of activity and tranquility. Its weight is about 200 grams, and the height is 12 cm.
From 19 weeks, the fetal lungs begin to grow actively. Bronchi become more branched, but the alveoli will appear much later. The spleen begins to function - it forms blood cells together with the liver and bone marrow. Very quickly develops the brain - it appears a lot of furrows. While the baby is small, he has the opportunity to tumble in the uterine cavity. But as the development of the child in the womb shows for weeks on end, soon he will not be able to move so freely because of the increase in his weight and height.
At 21-22 weeks the baby weighs 500 grams, and its growthabout 28 cm. It is still thin, so the metabolism is aimed at the accumulation of brown fat under the skin, which will help to keep heat and give nutrients after birth. The constitution of the fetus becomes more proportional, which is confirmed by ultrasound. From 23-24 weeks, active formation of all sense organs begins - sight, hearing, smell, touch, taste. This is due to a new jump in the development of the fetal nervous system. The endocrine system becomes more mature. The weight of the baby is about 500 grams, and the height is 28 cm.
At the end of the second trimester, a woman can breatherelief. The child at 26-27 weeks is still very weak, but all his organs have already formed. Therefore, when a baby is born, he has a chance to survive in special conditions. Further development of the child is aimed at maturation of internal organs and the accumulation of subcutaneous fat.
Development in the 3rd trimester
During the third trimester, the main taskthe kid is gaining weight. His internal organs are gradually being improved. The work of the endocrine system is being adjusted, the kidneys, lungs and digestive tract are already formed, but their work is still incomplete. Weekly development of the child in the womb will show that in the remaining three months they will learn how to function independently.
At the 27-29th week of pregnancy, the fetus appearsa large number of own hormones, since the adrenal glands, pancreas and thyroid gland are beginning to actively produce them. The mass of the brain and the number of convolutions in its structure increase. Fetal growth is about 35 cm, and weight is about 1000-1300 g. At 30-32 week all pregnant women undergo ultrasound. The result will please them - the face and body of the baby become proportional, the eyes are more often open, and fingernails appear.
At the 33-35 week of pregnancy, the main processesdevelopment fall on the musculoskeletal system and subcutaneous fat. Communication in the nervous system is improving. This is necessary in order for the baby to have birth congenital reflexes necessary for survival after birth. Especially developed sucking reflex, because even in the womb of the mother the child sucks his own finger.
Beginning at week 37, the baby is considered full. so the birth of a child at this time will not cause any problems. If childbirth started at week 36, then if there is enough weight problems with further care for the newborn will not arise. But if the baby weighs less than 2500 gr, you should put it in the cuvette for a while. It is best if the labor begins after 38 weeks. The fetal lungs were completely ripe by this time, and the subcutaneous fatty tissue was accumulated in full.
If the precursors did not appear before 39-40 weekschildbirth. then a pregnant woman should go to the hospital. It is necessary to control the condition of the fetus and the future mother. The development of the child in the womb goes right up to the birth. With prolonged pregnancy, this can lead to overstretch. With the help of ultrasound, CTG and tests, you can assess the blood flow in the placenta, identify signs of fetal hypoxia and the presence of gestosis in a pregnant woman. If necessary, then you should agree to stimulate labor for faster delivery.
For nine months, the future mother ishimself "under the heart" of the child. This period is one of the most tremulous, and at the same time the most difficult. But his result is always admirable, because a long-awaited baby appears in the light.