During a series of examinations during pregnancy, many new mothers may not even have heard of certain examination items. Take chorionic villus puncture and amniocentesis as an example. Many expectant mothers are not clear about the specific differences between the two. So, what are these two examinations for?
1. Different puncture sites
Villial puncture is mainly performed on the placenta, which is examined through the abdominal wall of the expectant mother. The doctor will penetrate the abdominal wall and reach the uterine cavity of the expectant mother, which can extract a small amount of villi. Finally, the doctor will perform an examination on these villi; And amniocentesis is performed by puncturing the abdominal wall of the expectant mother to extract a small amount of amniotic fluid, and then the doctor will culture and harvest these amniotic fluid cells for the next examination.
2. Different puncture times
Villial puncture is usually done in the early stages of pregnancy, and the best time for examination is between 11-14 weeks of pregnancy; However, amniocentesis is performed during the mid pregnancy period, which is the best time for examination. In addition, amniocentesis is also possible during the late pregnancy period, but the risk is higher.
3. Different puncture risks
The negative impact of chorionic villi puncture on the fetus is actually very small, but there is always a certain degree of infection risk, which is about 0.1% to 0.5%; In addition, amniocentesis also has side effects, with a 0.5% chance of causing fever, miscarriage, and infection in pregnant women. A small number of pregnant women may also experience cell culture failure, which forces them to undergo other tests. Of course, amniocentesis can also be performed again, but it depends on the doctor's decision.
