What happens during amniocentesis?
The test is usually done between the 15th and 20th week of pregnancy. It is sometimes done later in pregnancy to check the baby's lung development or diagnose certain infections.
During the procedure:
You'll lie on your back on an exam table.
Your provider may apply a numbing medicine to your abdomen.
Your provider will move an ultrasound device over your abdomen. Ultrasound uses sound waves to check the position of your uterus, placenta, and baby.
Using the ultrasound images as a guide, your provider will insert a thin needle into your abdomen and withdraw a small amount of amniotic fluid.
Once the sample is removed, your provider will use the ultrasound to check your baby's heartbeat.
The procedure usually takes about 15 minutes.
