120
Participants
Start Date
January 1, 2022
Primary Completion Date
December 31, 2022
Study Completion Date
March 31, 2023
early vaginal administration of carboprost methylate
In this group, the administration time point of carboprost methylate is 20 minutes before the surgery.
delayed vaginal administration of carboprost methylate
In this group, the administration time point of carboprost methylate is usually 110-120 minutes before the surgery.
Peking Union Medical College Hospital, Beijing
Peking Union Medical College Hospital
OTHER