Multiple choice

In which of the following procedures usually a small flexible plastic tube is inserted through the vagina into the uterus?

  1. Amniocentesis

  2. Chorionic villi sampling

  3. Alpha-feto protein screening

  4. Pregnancy ultrasound

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

This method is used to draw out a sample of chorion tissue for cell culturing. As with amniocentesis, ultrasound monitoring helps to prevent damage to the unborn child during the sampling procedure.