Age at first menstruation

The first time a woman has her first period is officially called menarche. Most girls have their first period at the age of twelve or at least fourteen. After menarche, a woman's breasts have begun to develop, her height suddenly grows, and female hormones begin to be produced. If a girl in her developmental period finds that she has vaginal bleeding one day, it means that she has had her first period. Due to genetic factors, geographical environment, some climatic factors and living environment, there are great differences in the age of menarche among people of different races and regions, as well as among different individuals.

Before menarche, you must pay attention to personal hygiene, especially the cleaning of the genitals. Generally, after puberty, girls will be affected by some female hormones and will produce some ovulation processes. Below we briefly introduce the age of menarche.

One day, a girl in puberty may suddenly find that blood is flowing out of her vagina. This is called menarche. The average age of onset is 12 to 14 years old. Due to the influence of genetic factors, geographical environment, climatic factors, life and social environment, there are great differences in the age of menarche among different races, people from different regions and individuals. Pay attention to personal hygiene during menarche, especially cleaning of the genitals.

When a woman reaches puberty, under the influence of the hypothalamus and pituitary hormones, the ovaries produce sex hormones, which stimulate the development of sexual organs and breasts, and begin to grow armpit hair and pubic hair; at the same time, the egg cells in the ovarian follicles gradually

[1] The mature follicle ruptures and discharges the egg out of the ovary. At this time, the fallopian tube umbrella absorbs the discharged egg into the fallopian tube lumen. After ovulation, the remaining cells in the follicle grow and increase rapidly and become yellow, which is called the "corpus luteum".

It secretes progesterone, which prompts the endometrial glands to secrete a nutrient-rich mucus in preparation for receiving the fertilized egg. If the egg is not fertilized, the corpus luteum will atrophy 9 to 10 days after ovulation, the secretion of estrogen and progesterone will decrease, and the endometrium will gradually atrophy, fall off, and bleed, which is the manifestation of menstruation.

Menarche and subsequent menstruation may not occur with ovulation. But there are rare cases where ovulation occurs one to two weeks before menarche.

The average age of first menstruation for Oriental women is between 12 and 16 years old. The statistics in different countries vary slightly, which is related to eating habits and climate.

The above is about the date and age of menarche. When a girl reaches puberty, under the influence of the hypothalamus and pituitary hormones, the ovaries produce sex hormones, which can stimulate the development of sexual organs and breasts. Due to genetic factors, geographical environment, some climatic factors and living environment, there are great differences in the age of menarche among people of different races and regions and different individuals.