How long does molar pregnancy last?

Depends.: In a molar pregnancy the placenta doesn't form properly and instead forms a tumor. It can be benign (lydatidiform mole) or malignant (choriocarcinoma). Usually there is no fetus and the problem is detected in the first or second trimester. There can be a partial molar pregnancy where there is a placenta and fetus, which can rarely go to term.

Molar pregnancy: Once a molar pregnancy is thought likely by a combination of ultrasound and bhcg, a auction D&C should be done immediately. Most molar pregnancies are discovered before 10 weeks gestation.