Chorionic villus sampling

In fact, in daily life, pregnant women should go to the hospital for regular prenatal check-ups, so that they can know the condition of their fetus at the first time. Chorionic villus chromosome testing is a must. Let us learn about the method of chorionic villus chromosome testing.

Chorionic villus sampling is also called "chorionic villus cytology" or "chorionic villus biopsy". In the 1970s, some people discovered that after chorionic villi fell off, they could be found in the cervical mucus of pregnant women. This discovery provided a shortcut to predict the sex of the fetus. It mainly uses a thin plastic tube or metal tube through the cervix of the pregnant woman, inserted along the uterine wall, and a small amount of villi is absorbed for cytological examination.

Chorionic villus sampling is a procedure in which chorionic villus of the embryo are collected vaginally or abdominally 50 days after pregnancy for chromosome or other tests to see if the child has a chromosomal disease. However, this method has the risk of miscarriage and may cause limb defects in the child. Because it is relatively dangerous, it is generally not done vaginally. Maternal blood screening mainly screens for trisomy 21 (Down syndrome) or trisomy 18, as well as three types of neural tube defects. It is usually done by drawing maternal blood on an empty stomach around 15-20 weeks of pregnancy. The results will tell you the risk of having the three suspected diseases in the child. If the result is high risk, amniocentesis is generally recommended for confirmation. The price is about 150-200.

Chorionic villus cytology is a new prenatal diagnostic technology developed in recent years. It mainly uses a thin plastic tube or metal tube to pass through the pregnant woman's cervix, enter along the uterine wall, and absorb a small amount of chorionic villi for cytological examination. When the pregnancy is 40-70 days, the blastocyst is surrounded by chorionic villi, which is the best time to conduct the examination. It is much earlier than the best time for amniocentesis (16-20 weeks), and its significance is of course much greater. It is mainly used to understand the sex of the fetus and whether there are any chromosomal abnormalities. It has high accuracy and has begun to be gradually promoted and used in China. Judging from its application in previous years, it has no adverse effects on pregnant women, and no abnormalities have been found in newborns and their subsequent follow-up observations. Therefore, it is a relatively safe and very promising prenatal diagnostic technology.

The above article has introduced the method of chorionic villus sampling in detail. I believe everyone has a relatively preliminary understanding. Therefore, in daily life, pregnant women must do this examination to determine whether their children are healthy.