When does a woman's menstruation come?

Everyone knows that women have a very long-lasting "best friend" and that is menstruation. Menstruation is our good friend that comes as scheduled every month. Menstruation makes every woman hate it because they have to suffer from dysmenorrhea. This is all due to our special physiological characteristics. In fact, it is also good for women to experience menstruation. It is also a detoxification process, but when does a woman's menstruation come? Let’s take a look together.

Menstruation, also known as the menstrual cycle, is a physiological cycle that occurs between some fertile female humans and other hominins. Other mammals go through estrous cycles. In women of childbearing age and female primates, the endometrium undergoes cyclical changes every month or so, with autonomous thickening, blood vessel proliferation, glandular growth and secretion, and endometrial collapse, resulting in menstruation and bleeding. This periodic vaginal discharge or uterine bleeding is called menstruation.

The uterus bleeds once a month, which is called menstruation. The ovaries have the functions of laying eggs, releasing ovulation and producing hormones. The hormones secreted by the ovaries are mainly estrogen, progesterone and androgen. Among them, estrogen is very important for maintaining the cyclical development and function of sexual organs, secondary sexual characteristics and ovaries. Progesterone mainly acts on the uterus to ensure the progress of pregnancy. Androgens increase sexual desire and are also involved in the regulation of follicle growth and egg maturation.

When a woman reaches puberty, the follicles mature and, with the help of luteinizing hormone, the follicles secrete estrogen and stimulate the endometrium to undergo proliferative changes. The amount of estrogen gradually increases, causing the endometrium to thicken, the glands to increase in number and lengthen, becoming curved, and the blood vessels to become spiral, which is called the proliferative endometrium. This is approximately day 11 to 14 of the full-term menstrual cycle. At this time, estrogen reaches its peak, and a large amount of estrogen acts on the hypothalamus, causing the pituitary gland to release a large amount of luteinizing hormone, thereby promoting ovulation of mature follicles. After ovulation, the ruptured ovum forms a corpus luteum. The corpus luteum secretes progesterone, which, together with estrogen, causes the endometrium to enter the secretory phase. If fertilization is not achieved at this time, the corpus luteum will atrophy, the secretion of progesterone and estrogen will decrease, the endometrium will not receive support from sex hormones, and will undergo necrosis and shedding, leading to menstruation. This is why the uterus produces menstruation.

Now that we know when women's menstruation comes, we can help female friends to grasp the time of menstruation well, so as to avoid being unable to prepare in advance when menstruation comes, which will affect our normal life and work. This will allow female friends to have a clear mind and will not suffer from dysmenorrhea due to eating cold things or taking a bath. Dysmenorrhea for women is very painful, so female friends must love themselves well.