<prompt> Causes of dysfunctional uterine bleeding can be:Uterine polypFibroidGranulosa cell tumourIrregular ripening of endometrium  <response>: Ans. is d and e i.e. Irregular ripening of endometrium; and Irregular shedding of endometrium DUB is defined as a state of abnormal uterine bleeding without any clinically detectable organic pelvic pathology. DUB is of two types : 1. Anovulatory 80 2. Ovulatory 20 Anovulatory 80 : Threshold bleeding of pubey menorrhagia Metropathia hemorrhagicadegcystic glandular hyperplasiadeg Premenopausal DUB Atrophy of endometrium. Ovulatory 20 : Irregular ripeningdeg Irregular sheddingdeg IUCD inseion Following sterilization operation. 