Mucous membrane, endometrium with periodic variety but occurrence of the ovary change, generally is divided into four periods:
A, proliferative phase, follicular phase
After the menstruation, under the estrogenic hormone action, the cell beginning of the mucous membrane, endometrium stratum basale the hyperplasis be a repair first to shell to take off a wound surface, later on because of continue hyperplasis but become thick, the ceruminous gland ketone body increase, mutation breadth, and gradually crooked.Blood vessel also hyperplasis, gradually present a spiral form.Mesenchyme the hyperplasis then is fine.
This expects an equal to mature stage of the follicular development, namely around the 5~14th day of menstrual cycle.
Two, secretory phase
About is 15~23 days of menstrual cycle, equal to ovulation after the corpus luteum mature stage
Progestogen and estrogenic hormone of corpus luteum secret, will make shell membrane inside the proliferative phase, follicular phase continue to increase thick, the ceruminous gland ketone body extend, flex, appears secret phenomenon further.The blood vessel also quickly increases, Be getting more crooked.Mesenchyme mutation puff also edena.At this time inside shell membrane thick and loose and soft, imply abundant Nutrition material, be advantageous to a fertilized ovum implantation a development.
Three, month premenstrual phase
Equal to corpus luteum regression stage, invite 24~28 days in menstruation.When corpus luteum deteriorate, the progestogen, estrogenic hormone level descended gradually.Hormone of this is diminished, will make to become inside the shell membrane mesenchyme edena regression fine, with the result that blood vessel is squeeze but make blood Yu Zhi.Finally take turns ground to appear a partial vascular spasm a contraction, result in inside the shell membrane ischemia, necrosis, the afferent rupture bleed.
Four, menstrual phase
For the 1~4th day of the menstrual cycle.At inside shell membrane function stratum, story(in the stratum basale above fraction, thick about 5~6 mm formation of spread in the small hematoma, will destroy deadly to shell to take off inside the shell membrane, eject with the blood, call that it is a menstruation.Inside the stratum basale of shell membrane immediately starts hyperplasis, the formation is new of inside shell membrane.The past menstrual phase is actually a be over of period, is also the beginning of next period.
