Pregnancy by week. Development of the fetus

The development of the child in the womb is truly a fascinating and unique process. A full-fledged child is formed from a few cells within nine months. And Mom, counting on the calendar every week, it is interesting to know, and what he is now, her baby? Pregnancy for weeks, the development of the child, what is happening to him now - that's what interests her.

Pregnancy by week. Development begins. First trimester.

1. By the end of the first week, the embryo of only a few cells turns into a clot from a hundred cells and resembles a bubble.

2. The rear part of the embryo becomes thicker, the laying of organs begins.

3. The first nerve cell appears, and a heart tube is laid.

4. There is a further laying of organs: the kidneys, intestines, bones, liver, ears, eyes, there are makings of the skin. The heart develops, its structure is more complicated.

5. There are pens, similar to fins, rudiments of tongue and lungs. And most importantly - from the fifth week the heart begins to function!

6. Obtains the shape of the head of the embryo, its feet and hands. The circulatory system begins to work.

7. Stand out chest and tummy. On small handles appear fingers. The organs are becoming more and more perfect. The size of the embryo is 10-15 mm.

8. The face is formed. Head is large, equal in size to the body. All bodies are finally formed, and some have already started their work. The sex organs of boys and girls are already different. The length of the embryo is 25-30 mm, weight 13 g.

9. The face is fully formed. Now this is no longer an embryo, but a fruit, its length is 30 mm.

10. The formation of the skeleton begins. The eyes and mouth differ distinctly, the tongue is formed. It is believed that from the tenth week the fetus begins to feel the mood of the mother.

11. Clearly distinguishable genital organs, which can be clearly seen on a good ultrasound machine.

12. The fruit floats in the amniatic fluid, the umbilical cord is developed and delivers food and oxygen to it.

Pregnancy by week. Development in the second trimester.

The most difficult - the first trimester behind, many threats have passed, new stages of pregnancy begin weeks.

13-14-15 week. The fetus begins to move! The pens are already grown and touch each other. The skin is very thin, blood vessels are visible through it. The length of the fetus is 10 cm.

16. There is active growth, the size of the fetus is already 15 cm. Start grasping movements and sucking a finger. The muscular system is being formed.

17-18-19 week. Mom feels the movements, the fruit is already 20 cm long and weighs 250 g. The skin is covered with a light fuzz, subcutaneous fat begins to be deposited.

20. In the intestine, the original calmetonium is formed.

21-22. The baby is no longer so wrinkled, eyebrows and cilia appear. At this time, sounds begin to reach him.

23. Hair appears. Length 30 cm, weight about 600 g.

24. There is a reaction to the touch of the mother, he hears her voice. The organs are developed enough to start an extrauterine life (only in very good and adapted conditions).

Pregnancy by week. Development in the third trimester.

25-26. Begin to open eyes. Reacts to sharp sounds and changes of the mother's posture by active movements.

27-28. Sometimes the fruit hiccups. The baby born on this term has all chances to survive. Its length is 35 cm, weight about a kilogram.

29-30-31. The baby flips the head down. He is no longer as wrinkled as before. The skin is red.

32-36 weeks. The baby is not red, but pink, the skin is smooth. Hair grows, marigolds are lengthened. At birth, the lungs straighten out without medical assistance, the child loudly screams.

37-40. Development is coming to an end. The length of the child is about 50 cm, the average weight is 3500 g. It is a fully formed baby with well-defined reflexes, ready to be born.

This is the answer to the question: "How does pregnancy last for weeks?". A beautiful process of transformation, evolution and development of a new life.