Pregnancy

Molar pregnancy, a rare complication


Due to an anomaly at the time of fertilization, the hydatiform mole or molar pregnancy does not lead to the birth of a living child. The explanations of Professor François Golfier.

Molar pregnancy, what is it?

  • The hydatiform mole or molar pregnancy is a complication due to a chromosomal anomaly occurring at the time of fertilization of the egg by the spermatozoon. For an indeterminate reason the distribution of paternal and maternal chromosomes is not done correctly, the placenta then develops abnormally.
  • This rare complication concerns 1000 pregnancies per year. Very young women, under 20 years old and women between 45 and 50 years old are considered as the 2 groups at risk of molar pregnancy.

There are 2 types of hydatiform moles

  • The complete mole In this form, there is never an embryo, only placenta that proliferates abnormally.
  • The partial mole : in this case the placenta also grows abnormally but in addition the embryo is poorly formed, it can usually develop but can not survive.
  • None of the 2 types of hydatiform moles can give birth to a living child. Pregnancy can not be continued. After confirmation of the diagnosis, it is necessary to proceed with the evacuation of the uterine contents by aspiration.

How to detect a molar pregnancy?

  • The diagnosis is made most of the time before the end of the 1st trimester of pregnancy: following bleeding which if they are not necessarily synonymous with moles, are a systematic indication to consult, or at the time of an echographic control .
  • Depending on the situation, certain complementary examinations (blood, imaging, chromosome balance) may be prescribed before making the diagnosis and proceeding with the evacuation of the uterine contents.

1 2