Skip to content

Health & Pregnancy

Font Size

Amniocentesis Risk Overrated?

Miscarriage May Be Rarer Than You Think After Amniocentesis
By
WebMD Health News
Reviewed by Louise Chang, MD

Nov. 1, 2006 -- Amniocentesis may be even safer than doctors previously thought.

That news comes from a study of about 35,000 U.S. women who were 10 to nearly 14 weeks pregnant.

The study appears in Obstetrics & Gynecology. The researchers included Keith Eddleman, MD, of New York's Mount Sinai School of Medicine.

The women were offered amniocentesis, in which doctors insert a thin needle through the belly to get a small sample of amniotic fluid, which surrounds the baby in the womb.

The test is used to check the baby's risk for genetic conditions such as Down syndrome.

Most of the women -- nearly 32,000 -- declined amniocentesis. About 3,000 got amniocentesis.

About 1% of the women in both groups miscarried before 24 weeks of pregnancy.

The amniocentesis-related miscarriage rate by 24 weeks of pregnancy was 0.06%, or about one in 1,600 pregnancies studied.

That's lower than the rate of 0.5%, or about one in 200 pregnancies, from studies done in the 1970s, before current amniocentesis techniques were in place, the researchers note.

Eddleman commented on the study in a Mount Sinai School of Medicine news release.

He says women's decisions about amniocentesis "should be based on contemporary information about miscarriage rates with newer screening techniques, rather than just relying on general age-based risks."

The findings "will have a significant effect on how women are counseled about amniocentesis by their doctors and the information they have when deciding about screening for their unborn child," Eddleman predicts.

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
Slideshow
pregnancy first trimester warning signs
Article
 
What Causes Bipolar
Video
Woman trying on dress in store
Slideshow
 
pregnant woman
Article
Close up on eyes of baby breastfeeding
Video
 
healthtool pregnancy calendar
Tool
eddleman prepare your body pregnancy
Video