Amniocentesis, a medical procedure performed to obtain a small amount of amniotic fluid, is usually done between the 16th and 20th weeks of pregnancy. This fluid contains DNA from the baby’s skin cells that can show a genetic disorder or chromosome abnormality such as Down syndrome.

Animation produced by Visible Productions Inc.

Want to know how to look marvelous without splurging so much? Dr. Oz invites three beauty experts to share the smartest ways to save money while looking fabulous starting from your hair and makeup tools to the beauty products you use.