After expelling a hydatidiform mole, which response best addresses the patient’s question about when to try to become pregnant again?

• A. Wait at least 6 months.
• B. Wait at least 1 year.
• C. Wait at least 2 years.
• D. There is no waiting period.

Answer: (B)

After a molar pregnancy is evacuated, the priority is to prove that there is no persistent trophoblastic disease. That means carefully tracking the pregnancy hormone (hCG) levels until they fall to and stay at undetectable levels for a sustained period. Only after you’ve confirmed this stability should we consider trying to conceive again.

Waiting at least a year gives time for complete resolution to be verified and reduces the chance that a hidden persistent mole or rising hCG could be mistaken for a new pregnancy. It also allows the uterus to recover after the evacuation so a future pregnancy can be monitored safely from the start.

Shorter intervals, like six months, may not provide enough time to detect late persistence; longer intervals, such as two years, aren’t usually necessary unless there are specific concerns. There is a definite waiting period recommended to balance safety and future fertility.