How to calculate your menstrual cycle

How to calculate the menstrual cycle?

Menstruation, also known as the menstrual cycle, is a physiological cycle that occurs between some fertile women and other human animals. After entering puberty, the endometrium is affected by ovarian hormones and periodic uterine bleeding occurs, which is called menstruation. The cyclical changes in the endometrium are called the menstrual cycle, which is also the reproductive cycle of humans. The first day of menstruation to the day before the next menstruation is usually called the menstrual cycle, and the average monthly menstrual cycle is about 28 days. According to the histological changes of the endometrium, women generally begin to have their first menstruation at the age of 13 to 14, which is called menarche. 45 to 50 years old is the end of menstruation. The human nervous system can regulate ovarian activity, which can cause menstrual cycle disorders when you are nervous or overly worried. There is usually no menstruation during pregnancy and lactation. The interval between the first day of two menstruations.

Most of them are 28 to 30 days, and an advance or delay of about 3 days is within the normal range. The length of the cycle varies from person to person, but each woman's menstrual cycle must have its own regularity, otherwise it should be considered abnormal. The menstrual cycle is regulated by the interaction between the hypothalamus-pituitary-ovary. The hypothalamus regulates pituitary function, and the pituitary regulates ovarian function. The endometrium undergoes cyclical changes under the action of ovarian hormones. The sex hormones produced by the ovaries in turn act on the hypothalamus and pituitary gland, affecting the release of gonadotropin-releasing hormone Gn-RH, follicle-stimulating hormone FSH, and luteinizing hormone LH, which is a feedback effect.