The menstruation is a periodic metrorrhagia and be called because the majority is to appear once monthly menstruation.&127;Why will the female s have a menstruation?Have to understand the female’s reproductive organ structure and its physiology function first, then can explain this problem.Female of inside the reproductive organ constitute to°from the ovary, uterus, fallopian tube.The cardinal function of ovary produces ovum and the hormone, uterus and fallopian tube of the synthesis ovary to then grow organ, there are more than 100,000 ovarian follicles in the ovary, there is an ovum in each ovarian follicle.The puberty and previous ovarian follicle basically has no function.Arrived a puberty, under the action of the tapetum hypophysis, pituitary gland ex- leaf, frond gonadotropin, the not mature ovarian follicle develops gradually and synthesize estrogenic hormone in the meantime.When ovarian follicle snow teaches maturity to be alongside of an egg after, the egg Tang wall falls to sink, the cell become big, mutation Huang, be called corpus luteum, it not only synthesize estrogenic hormone in the meantime still produce a progestogen.Along with the variety of ovary, the mucous membrane, endometrium is affect by it to also take place homologous periodic variety.The estrogenic hormone makes the mucous membrane, endometrium increase thick, inside the shell membrane cell increase, augmentation, know the palatine canal becomes to add a circuit more, present a spiral form and be called a proliferative phase mucous membrane, endometrium.After ovulate, because of the common action of the estrogenic hormone and the progestogen, mucous membrane, endometrium occurrence edena, the ceruminous gland ketone body produces a great deal of mucilage and glycogen, inside the film thickness increase to°from 1 millimeter 6 millimeters and be called a secretory phase mucous membrane, endometrium.If the ovum ejected at this time conceived, the fertilized ovum then was delivered a development inside the uterus by fallopian tube, be called a pregnancy, the pregnancy tissue synthesizes one species prolan, and the its support ovary corpus luteum continues to develop;If the ovum conceived, around 14 dayses after ovulate, corpus luteum depauperate, stop secret estrogenic hormone and progestogen, at this time the vasoconstriction in the mucous membrane, endometrium, inside shell membrane necrosis but abscission, cause a bleeding, hemorrhage, become a menstruation.Therefore, the length of menstrual cycle, be decided by the length of ovarian cycle, general is 28 ? 30 day, but vary from person to person, also have 23 ? 45 day, even 3 months or half year is a period.As long as there is regulation, generally and all belong to a normal menstruation.Bleeding, hemorrhage of time generally is 2 ? 7 day, every time menstruation bleeding, hemorrhage total amount not more than 100 milliliters.
Sep
04
By: Gelais
