Your browser does not support javascript:   Search for gard hereSearch for news-and-events here.


Genetic and Rare Diseases Information Center (GARD)

Print friendly version

Hydatidiform mole

Other Names for this Disease
  • Hydatid mole
  • HYDM
  • Molar pregnancy
See Disclaimer regarding information on this site. Some links on this page may take you to organizations outside of the National Institutes of Health.

Your Question

My daughter had a molar pregnancy less than a year ago. She is pregnant again and is having similar symptoms as in her first pregnancy. What are the chances that she has another molar pregnancy?

Our Answer

We have identified the following information that we hope you find helpful. If you still have questions, please contact us.

What is molar pregnancy?

Molar pregnancy is a condition in which the placenta does not develop properly. The symptoms of molar pregnancy, which may include vaginal bleeding, severe morning sickness, stomach cramps, and high blood pressure, typically begin around the 10th week of pregnancy. Because the embryo does not form or is malformed in molar pregnancies, and because there is a small risk of developing a cancer called choriocarcinoma, a D&C is usually performed.[1]
Last updated: 7/15/2013

If one has had a molar pregnancy, what is the possibility of having future molar pregnancies?

Although we cannot provide specific risks, the literature states that the majority of women who become pregnant after a molar pregnancy will not have another molar pregnancy. In general, the risk of a repeat mole in a subsequent pregnancy is about 1 in 60.[2]
Last updated: 7/15/2013

If one is concerned about having another molar pregnancy, who might one speak to?

If you are concerned about your chances of having another molar pregnancy, we recommend you speak with your health care provider.
Last updated: 7/15/2013