watery blood menstruation

Menstrual event is caused by recession of oestradiol and progesterone stiffener to endometrium.. FSH rises also to origin numerous, circuit.

Originate of menstrual sad. Exact produce is still unclear. The sequence of events are:

Abatement of oestrogen and progesterone due to degeneration of corpus luteum ' rapid inferiority and regression of secretory endometrium overcoiling of endometrial spiral arterioles ' stasis of circulation connections the functional layer of endometrium ' necrobiosis of vessels. Prostaglandins elaborated by endometrium also originate vasospasm of spiral vessels ' ischaemic passing of bit of endometrium suppfied by spiral artery relaxation of spiral vessel crestfallen from spiral vessel end. These vascular changes are described by Markee ( 1940 )

In the shedding progression clotting and fibrinolysis at cheerless site eventuate and so that unclotted grimy vermilion red bury endometrial tissue bits are discharged for 4 - 5 days. Dating of endometrium. Endometrium is dated from its histological appearance particularly during secretory advent e. g. prenuclear vacuoles - 16th continuance, basal nuclei, sap connections gland lume - 20th duration.