How many days does it normally take for a girl to have her first period?

The arrival of menarche indicates that girls have entered the ranks of adolescent girls, so at this time they should pay more attention to their physical health and care. They need to understand the time of girls' menarche and menstruation, as well as various protection issues, so that they can grow up healthier and more beautiful. Let us learn about the time of girls' menarche and the duration of menstruation.

Generally, it lasts for 3-7 days. The girl is in the sexual maturity period, and the function of the hypothalamus-pituitary-ovarian axis has not yet fully matured. When menstruation begins, there is no ovulation, but only estrogen is produced, which causes the endometrium to proliferate. However, the estrogen level is very low, which stops the endometrium from proliferating and causes it to shed and bleed.

Therefore, some girls will have to wait several months after their menstruation, sometimes they have irregular bleeding, and sometimes they have continuous bleeding after a short period of amenorrhea. This is the reason for menstrual disorders in girls. After a period of adjustment, the ovaries mature and can ovulate regularly, and then a normal menstrual cycle can be established.

After menarche, menstruation is often irregular, occurring only once every several months or a year, or bleeding continuously, resulting in "functional bleeding" of the uterus. This is because the ovarian function is not yet fully developed. The duration of menarche varies from person to person, some people last two days and some people last five days.

In fact, for many girls, their menstruation has not yet formed a regular pattern after their menarche, so the menstruation is relatively chaotic at this time. This is a normal phenomenon, caused by the incomplete development of ovarian function. Therefore, women should not worry too much, and paying attention to menstrual care and health care will not have any adverse effects.