Prevalence of Cesarean Section Niche in Women With Unexplained Abnormal Uterine Bleeding

Inclusion Criteria: Patients with a history of cesarean section who are complaining of abnormal uterine bleeding with the following criteria : * Normal complete blood count apart from paramaters of anemia * Not using drugs affecting coagulation profile * Bleeding is not related to pregnancy * Not using intrauterine contraceptive devices or hormonal contraceptives * By ultrasonography : no abnormalities in the pelvis e.g benign or malignant tumors , ovarian cysts or tumors * No evidence of cervical abnormalities as cause of bleeding with cervical examination or cervical smears Exclusion Criteria: * Any patient not fulfilling the inclusion criteria * If the patient refused the technique ( office hysteroscopy )