Skip to content

Health & Pregnancy

Font Size

Genetic Screening Tests for Women 35 or Older

Noninvasive Prenatal Diagnosis

This new blood test, also called cell-free DNA testing, is used to show whether you are at risk for having babies with chromosome problems. Because it's done by using a sample of your blood, it's less invasive than amniocentesis or CVS.

The test finds a baby's DNA floating around in the mother's blood. The result determines the chance that the baby could be born with Down syndrome, trisomy 18, or trisomy 13.

Using this test in twins remains controversial. Ask your doctor or genetic counselor if this test is appropriate for you.

WebMD Medical Reference

Reviewed by Traci C. Johnson, MD, FACOG on August 04, 2014

Pregnancy Week-By-Week Newsletter

Delivered right to your inbox, get pictures and facts on
what to expect each week of your pregnancy.

Today on WebMD

hand circling date on calendar
Track your most fertile days.
woman looking at ultrasound
Week-by-week pregnancy guide.
Pretty pregnant woman timing contaction pains
The signs to watch out for.
pregnant woman in hospital
Are there ways to do it naturally?
slideshow fetal development
pregnancy first trimester warning signs
What Causes Bipolar
Woman trying on dress in store
pregnant woman
Close up on eyes of baby breastfeeding
healthtool pregnancy calendar
eddleman prepare your body pregnancy