baby development, these organs of the baby are completely formed in the 13th week, the baby starts movement in the womb – fetal-development-how-much-baby-develop-in-13-weeks-in-womb

how big is the baby

According to the American Pregnancy Association, your baby’s head is currently the largest part of his body, but that is about to begin. At this time the head of the baby is only 1/3 of its body. Unique fingerprints have started forming on the fingers of the baby. Kidney and urinary tract is working perfectly. Apart from this, the skin of the baby is also covered and its light hair has come.

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what is the size of the baby

In the 13th week of pregnancy, the size of the baby is about 3 3/4 inches or 9.5 cm long and its weight is about 35 grams. Your baby is starting to move and move its arms and legs. Your baby bump may be visible now or very soon, so you can shop for pregnancy outfits for week 13 and in the weeks to come.

Which organs have been developed

This week, your baby’s organs are fully formed and functioning. The kidneys are starting to produce urine and release it into the amniotic fluid, and the spleen is busy producing red blood cells, which carry oxygen throughout the body. Your baby’s intestines have moved from the umbilical cord back into the abdomen, now there is enough room to accommodate them.

how much the baby’s body has developed

Some large bones including the brain have started to harden. Your baby’s vocal cords have started to develop. According to the National Health Service, at this point the baby is the size of a peach and his ovaries and testes are fully developed. Now the baby starts moving in the womb. You will feel the movement of the baby in the 17th week. Some babies suck their thumbs in the womb.
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changes in mother’s body

Now you may feel tight in your old clothes. Stretch marks can appear on the abdomen, breasts, hips or buttocks. Your morning sickness may begin to subside at this point, but you may experience frequent bouts of low mood. You may also notice some distinctive changes in your breasts. By now your breasts will have grown and may feel lumpy, which is due to the mammary ducts as they begin to prepare for milk production. You may also notice that veins become visible just under the skin of your breasts. In addition, colostrum begins to form during the second trimester; This is the first stage of breast milk, and can be expressed from the nipple when massaged.
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References:
https://www.nhs.uk/start4life/pregnancy/week-by-week/2nd-trimester/week-13/
https://americanpregnancy.org/healthy-pregnancy/week-by-week/13-weeks-pregnant/