Stage of Infant Development in the Contents of Weeks 1-40

Contents:

Medical Video: How a baby develops during pregnancy

Did you know that the development of babies in the womb goes very fast? Babies learn a lot and even do various things in the womb, such as laughing and crying, which is one sign of growth and development. The following is information on the development and growth of the baby when in the womb:

First week of pregnancy

Calculation of gestational age starts from the first day of the last menstruation - before the end of menstruation can be said to be late. Therefore, it can be said that in the first and second weeks, you actually have not experienced a pregnancy. Then what happened this week? After experiencing the fertilization process, which is the meeting of eggs with sperm, a network of 100 cells will be formed which will later become the embryo of the fetus. After splitting and multiplying cells, the prospective fetus or embryo will stick to the uterus, which is where the growth grows during pregnancy.

Second week's pregnancy

Entering the second week, approximately 150 cells belonging to the embryo formed three layers, namely the endoderm, mesoderm, and ectoderm. These layers formed by cells will become various organs and body parts of the baby, such as muscles, bones, heart, digestive system, reproductive system, and nervous system.

Third week pregnancy

The embryo successfully attaches perfectly to the uterus. At this time, the embryo still divides and multiplies cells, therefore it has not been shaped like an embryo or baby. The outermost layer of the embryo will form the placenta or placenta. At this stage too, various organs of the body begin to be formed, such as the brain, spine, thyroid gland, heart organs, and blood vessels. The size of the embryo in the third week is still very small, only 1.5 mm.

4th week pregnancy

The heart has formed and begins to function and the blood vessels already have their own blood flow. In addition, it has begun to form hands and feet. At week 4 the embryo size is 5 mm.

Week 5 pregnancy

The baby's hand has started to grow, but it is still not shaped like a hand, still flat without the fingers. The basic structure of the brain and nervous system has also been formed, while new eyes, ears and mouths will be formed. Size at week 5 is 7 mm.

6 week pregnancy

Enter to week 6, the size of the embryo is as big as a pea or about 12 mm. The feet have started to grow even though the toes have not yet formed. The digestive system is just starting to grow. While the upper lip and palate have formed. The head of the embryo has begun to appear but its size is very small, and it appears that the ears and eyes are being developed.

7 week pregnancy

The size of the embryo when entering the 7th week is around 19 mm. At this stage, new lungs will be formed, fingers will begin to appear, and the muscles and nervous system will function properly. Therefore, at this time, the embryo can show its reflex to his mother.

8 week pregnancy

At week 8, the embryo can be called a fetus because it already has a human shape and face. The eyelids and nose begin to form this week. At this stage, the placenta develops and the fetus is surrounded by amniotic water formed from the mother's blood vessels. Amniotic water functions to keep the temperature of the fetus normal, helps the fetus move, and helps in the development of the fetal heart. The size of the fetus reaches 3 cm or the size of plums at the 8th week.

9 week pregnancy

The fetal face is more clearly formed. The eyes are bigger and colored, according to the pigments that each fetus has. The fetus is able to open its mouth and vocal cords and salivary glands begin to form. A 9-week-old fetus is about the size of a limo or about 5.5 cm.

10 week pregnancy

A 10-week-old fetus measures 7.5 cm, has a head that is larger than its size. The heart works perfectly. The heart in the fetus beats 180 times per minute, two or three times faster than a normal heart rate in adults. Bone cells are first formed, replacing the previously formed cartilage.

11 week pregnancy

Face bones begin to form, the eyelids are still closed and will not open until the next few weeks. Nails have also been formed. This week, it turns out that the fetus can swallow and expel urine, which is released in the amniotic fluid.

12 weeks pregnancy

After the last 12 weeks of your menstruation, all the organs and systems of the body that are present in adults have all been in the fetus. Organs, muscles, glands, and bones, are perfectly formed and begin to function. Starting from this week, there will be development and maturation of various organs that have been formed before. The fetal spine that was formed from cartilage, in the 12th week will turn into hard bone.

Week 13-17 pregnancy

When entering the age of 13-17 weeks, the fetal weight is 57-113 grams and is about 10-13 cm long. The fetus experiences dreams at this stage, it can wake up and then sleep. In addition, the mouth of the fetus can also be moved, such as being opened or closed. At week 16, the fetus can be seen the sex, whether he is male or female can be helped see by doing an ultrasound. Fine hairs appear on the head, called lanugo.

Pregnancy week 18-22

The size of the fetus has reached 25 to 28 cm and weighs 227 to 454 grams. At this stage, the existing and hard bones have replaced the prone bones in the fetus. The fetus can hear and respond to movements. Therefore, the mother can feel kicks, blows and various movements of the fetus. Oil glands on the skin start working.

Week 23-26 pregnancy

The fetal pancreas starts working effectively and the lungs mature at this stage. Babies born when entering the 23-26 week have greater chances of survival, compared to previous weeks. Eyelashes and eyebrows began to appear.

27-31 week pregnancy

It is estimated that 91% of fetuses born at week 27-31 can survive despite the risk of experiencing various complications such as birth defects and low birth weight. Basically, all organs and systems of the body are more mature at this age and will continue to develop until the birth takes place.

32-36 week pregnancy

The movements and kicks carried out by the fetus are getting stronger and more pronounced. At present, the skin of the fetus is pink and very smooth. The fetus at this age has a weight of 1,814 to 2,268 grams and a length of about 41-43 cm.

37-40 week pregnancy

This week is the last weeks of pregnancy. At present the fetus's body weight has reached 2,722 to 3,639 grams and the body length is around 46 cm. In male infants, the testicles are perfectly formed and coated with the scrotum. When entering the 40th week, the fetus is ready to be born and all organs are formed and functioning properly.

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Stage of Infant Development in the Contents of Weeks 1-40
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