This is an automatically translated article.
The article is professionally consulted by Specialist Doctor II Bui Minh Phuc - Department of Obstetrics and Gynecology - Vinmec Ha Long International Hospital.
The 13th week of pregnancy is the last week of the first trimester (first trimester). On the tiny fingers of the fetus, fingerprints appear and gradually complete.
1. Changes in the 13-week fetus
There is no pregnancy in the first or second week of pregnancy. Most likely so. By convention, the due date is calculated 40 weeks after the first day of the last menstrual period, which means that the duration of the period is also included in the time of pregnancy, despite the fact that fertilization has not yet occurred. happensFor that reason, the first trimester of pregnancy (first trimester) practically ends at 13 weeks. At this point there will be the emergence of an important biometric feature that exists. forever, never changing, that is the fingerprint of the fetus.
On the tiny fingers of the fetus, fingerprints appear and gradually complete. Besides, blood vessels as well as internal organs can be clearly seen through the fetal skin. If the fetus is female, there are now more than two million eggs in the ovaries.
Another important feature that also appears at this time, is that the fetus begins to drink amniotic fluid and excrete urine, forming a cycle. Meconium also begins to form. Meconium is a black, sticky substance that exists in the fetal colon, and can be seen by parents when the baby has a bowel movement for the first time after birth.
Trắc nghiệm: Xét nghiệm Triple test là gì? Cần thực hiện khi nào?
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Article referenced source: babycenter.com