Question

Which of the following procedure is involved in injecting a small flexible plastic tube into the uterus through the vagina?
A. Amniocentesis
B. Alpha-fetoprotein screening
C. Chorionic villi sampling
D. None of the above

Answer 1

Hint:
Before we proceed into the problem, it is important to know the definition of Amniocentesis.
Amniocentesis is a procedure that involves the insertion of a long, thin needle into the amniotic sac surrounding the baby's navel to collect cells for analysis. This test can be used to determine if there is any problem with the baby's development or anatomy. Amniocentesis may also be performed in cases where women are suspecting they have gestational trophoblastic disease (GTD), which is an immune-mediated disorder that affects unborn babies.

Complete answer:
Chorionic villi sampling (CVS) is a procedure that allows for the detection and evaluation of pregnancies earlier than usual. It involves removing a small sample of chorionic villi from the womb, which is then evaluated to determine the stage of pregnancy. This can be used in cases where there might be an early indication that something is wrong with the baby, such as suspected pre-eclampsia or miscarriage.
Using the picture from the ultrasound scan, a needle is injected through your skin into your womb and directed to the placenta. The needle has an injection attached, which is used to extract a little sample of cells from the chorionic villi. The needle is taken out when the sample has been taken out.
Therefore, Chorionic villi sampling is involved in injecting a small flexible plastic tube into the uterus through the vagina.

Option ‘C’ is correct

Note:
In order to collect a sample of chorionic villus cells from the placenta, a thin tube is guided through the cervix (as shown above) or a needle is inserted into the uterus. The genetic material of a child is stored in these cells. Similar to amniocentesis, chorionic villus sampling carries hazards such as pregnancy loss, haemorrhage, infection, membrane breach, and unreliable results.