Causes of dysfunctional uterine bleeding can be:a) Uterine polypb) Fibroidc) Granulosa cell tumourd) Irregular ripening of endometriume) Irregular shedding of endometrium

DUB is defined as a state of abnormal uterine bleeding without any clinically detectable organic pelvic pathology. DUB is of 2 types:      1. Anovulatory (80%)                                       2. Ovulatory (20%) Anovulatory (80%):   • Threshold bleeding of puberty menorrhagia                                      • Metropathia hemorrhagica/ cystic glandular hyperplasia                                      • Premenopausal DUB (Atrophy of endometrium). Ovulatory (20%):       • Irregular ripening of corpus luteum                                      • Irregular shedding of corpus luteum                                      • IUCD insertion                                      • Following sterilization operation.