Human chorionic gonadotropin levels in complete and partial hydatidiform moles and in nonmolar abortuses.

The rates of regression of human chorionic gonadotropin (hCG) in patients with complete hydatidiform moles, partial hydatidiform moles, and nonmolar abortions were compared. No difference in rates of regression was found among the three groups, but levels of hCG immediately after uterine evacuation were significantly higher in the group with complete hydatidiform moles. Differences in the time required for hCG levels to become undetectable were attributed to the difference in the degree of initial elevation of hCG.