The effect of estrogen in the prevention of adhesion reformation after hysteroscopic adhesiolysis

Patients: 207 patients with mild [American Fertility Society (AFS) score 1~6] and severe (AFS score7~12) intrauterine adhesion who underwent hysteroscopic adhesiolysis.
Interventions: Patients were randomized to a treatment group or a control group, stratified according to the pre-operative AFS adhesion score. The treatment group received estrogen while the control group did not. All patients had second-look hysteroscopy at 4 weeks and third-look hysteroscopy at 8 weeks after surgery.Record the patient's basic information, AFS score and menstrual volume in the Excel
Measurements : Primary outcome measure was adhesion reformation rate and AFS score at third-look hysteroscopy, Secondary outcome measures included menstrual pattern improvement rate at 3-month post-operation.