In AUB, there is :
Increased estrogen
Decreased receptors of progesterone
Decreased receptors of estrogen
Pituitary imbalance of hormones
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
Disorders of menstruation