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Chorion biopsy. What is it used for in pregnancy

Chorion biopsy. What is it used for in pregnancy


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Among all the tests that a pregnant woman can undergo during the nine months of gestation, we have some that aim to rule out chromosomal abnormalities in the future baby.

The best known, due to its frequency, is amniocentesis; however, there are others that allow us to see possible congenital defects (the same as with amniocentesis) but which can be detected early in pregnancy. One of them is the chorionic biopsy.

Chorion biopsy It consists of obtaining a sample of the chorionic villi (cells that protrude from the placenta in the form of very small fingers); that is, remains of fetal cells that are housed in the placenta. It is usually done between weeks 10 and 14 of pregnancy.

The most frequent is that the sample is taken through the cervix, by means of continuous ultrasound control: a semi-rigid clamp is inserted through the vagina, and a sample of the leafy chorion (placenta) is obtained. An aspiration of the villi can also be done.

The procedure can be a bit painful, but it is quick: it is usually about half an hour, from start to finish, and the extraction itself only takes a few minutes. Women who have had a chorion biopsy say it feels similar to a Pap smear - it may not hurt or feel like a pinprick or period pain.

Sometimes, at least, the placenta is accessed through the abdomen, laparoscopically and under continuous ultrasound control.

This test is indicated when the baby has a high probability of having congenital anomalies, it is usually recommended to couples with family histories with a history or risks for a certain disorder. The samples collected during the extraction are cultured immediately and the results are obtained within the first 48 hours, which is considered very fast. What precautions should I take ?:

- Rest 24-48 hours after the puncture.

- Do not make efforts for a while afterwards.

- Administration of anti-D gamma globulin to all Rh negative pregnant women.

The test has a seven to eight percent miscarriage risk. It may happen that the pregnant woman experiences pain or discomfort and bleeds a small amount in the next 48 hours.

There are also studies that indicate that a chorion biopsy performed before the 11th week of pregnancy can lead to defects in the baby's limbs, such as missing fingers or toes.

You can read more articles similar to Chorion biopsy. What is it used for in pregnancy, in the category of Stages of pregnancy on site.


Video: Chorion villus biopsy for prenatal diagnosis of FGFR3 gene mutation, previous child Achondroplasia. (February 2023).