In AUB, there is :
Most Common cause of AUB is anovulatory cycles with excessive or unopposed action of oestrogen on the endometrium Reference: Shaw&;s textbook of Gynaecology; 15th edition; Pg no:301
Increased estrogen
Decreased receptors of progesterone
Decreased receptors of estrogen
Pituitary imbalance of hormones
Disorders of menstruation