Objective:To investigate the effect of low dose progesterone on colporrhagia after medical abortion and compare it with curettage.Methods:Divide 120 cases of medical abortion into observation group

curettage group and control group.Medroxyprogesterone Acetate was administered to observation group for oral use.Results:Comparing with control group

duration and amount of bleeding decreased significantly by given low dosage of medroxyprogesterone acetate in observation group

but it was higher than curettage group.From control group

observation group to curettage group

the cases of bleeding duration less than 7d increased by 5.41%

16.67% to 93.62%

and the cases of bleeding amount less than menstruation increased by 8.11%

61.11%

82.98%.The difference was particularly significant between each 2 groups.Conclusion:Oral administration of medroxyprogesterone acetate could decrease the duration and amount of bleeding after medical abortion.It was very convenient to comply and spread widely.