**5. Role of hysteroscopy after embryo transfer**

In a study evaluating the incidence of endometrial injury following embryo transfer, office hysteroscopy was performed immediately following embryo transfer and demonstrated marked endocervical and endometrial damage following rigid catheters more than soft catheters (42). Even for cases of early abortion following IVF/ICSI, hysteroscopy was proved to be very valuable. In one study (43), among 84 early abortion patients after IVF-ET, it succeeded to diagnose intrauterine abnormalities in 58 (69.05%) of the patients, including intrauterine adhesion in 32 (32/84, 38.10%), endometrial polyps in 12 (12/84, 14.29%), endometritis in 10 (10/84, 11.90%), submucous leiomyoma in 3 (3/84, 3.57%) and septa in 1 (1/84, 1.19%).
