How is menstruation formed?

What is menstruation? Menstruation refers to regular and periodic uterine bleeding. The first menstruation of a girl is called menarche or menarche. It is like the "Primula" of youth, which means the further development of ovary, the maturation of follicle, ovulation and the increase of sex hormones. Every healthy girl will have regular menstruation when she reaches a certain age. How is menstruation formed? So how is menstruation formed? This starts with the periodic shedding and repair of endometrium. The endometrium is divided into two layers. The surface layer is called functional layer, which falls off once a month with the change of menstrual cycle, mixes with menstrual blood and is discharged together with menstrual blood. The lower layer of endometrium is called basal layer, which is the basis of uterine regeneration. Does not fall off with menstruation. Periodic changes of endometrium. Dominated by ovarian endocrine hormones. It is recommended to read that the primordial follicles in the ovary begin to develop during menstruation, and continuously secrete estrogen after growing up, which promotes the growth and thickening of endometrium, thickening of arterioles and increasing of glands. When the follicle matures, it will expel the egg, form a "corpus luteum" and secrete progesterone. Progesterone will thicken the endometrium and enlarge the glands, making the endometrium loose and soft, just like a sponge pad, providing an ideal place for the implantation and development of fertilized eggs. If the egg is not fertilized, it will die after about 24 hours. Once the egg dies, the "corpus luteum" in the ovary will degenerate and shrink in about 10 days. At this time, the secretion of estrogen and progesterone suddenly decreased greatly. Because the thickened endometrium can't grow without the effective support of hormones, it is shrinking, thinning, necrosis and shedding, blood vessels rupture and bleeding, and the shed endometrium and blood flow out of the vagina. This is menstruation. Why do 55 patients with hysteromyoma choose ultrasonic ablation of menstrual cycle? After menopause for 3~5 days, new follicles begin to grow and develop, endometrium thickens again, and a new menstrual cycle begins. Because the ovulation cycle is generally one month, the cycle of vaginal bleeding is also one month, which is menstruation. Normal women begin with menarche and last for about 30~35 years. By the age of 40-50, menstruation will gradually stop with the aging and deterioration of ovarian function. If the discharged egg meets healthy sperm, the fertilized egg will produce a hormone to act on the ovary, so that the "corpus luteum" of the ovary will not degenerate, and a large amount of estrogen and progesterone will continue to be secreted, so that the fertilized egg will be planted on the soft endometrial bed, and the process of new life will begin, and menstruation will temporarily stop. Recommended > > The best treatment for hysteromyoma-ultrasonic ablation Author: The first portal of hysteromyoma -99 hysteromyoma network This article belongs to 99jiliu, and will be held accountable if reproduced without approval.