In the present study, we evaluated the elimination time and the disapp
earance curve of maternal plasma hCG after induced abortion in 44 pati
ents. The patients were divided into two groups: patients in group 1 h
ad gestations at or at less than 8 weeks and group 2 consisted of pati
ents with gestations at more than 8 weeks in whom sharp curettage was
utilized. The entire group had a mean of 48 342 mIU/ml baseline level
of maternal plasma hCG. After the evacuation of the uterine cavity, a
rapid decrease of plasma hCG occurred within the first week, followed
by a gradual decline until elimination was total. The mean disappearen
ce time of plasma hCG was 30 days. The disappearance curve of hCG was
found to be in a form similar to that described before. No significant
difference was found between the two groups. We conclude that when th
e appropriate method is used for pregnancy termination, the time betwe
en the procedure and disappearance of hCG depends on the initial hCG v
alue.