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

Everyone is familiar with women's menstruation, and there are a lot of products and articles related to menstruation. However, there is relatively little discussion about the issue of girls' menarche. Perhaps girls of this age are still relatively reserved or don't understand these changes in their bodies very well. So today we still provide information in this regard, focusing on the menarche cycle, hoping to give you some reference.

A girl's first menstrual period is called menarche. Most girls have their first period between the ages of 12 and 14. Before menarche, girls' breasts begin to develop, their height grows suddenly, and some have already grown pubic or armpit hair. Generally speaking, menarche is often anovulatory menstruation, and ovulation occurs several months to a year after menarche.

Generally, after 4 to 5 days, most of the endometrium is shed. Under the action of female hormones, a new layer of endometrium grows and gradually thickens. At this time, the menstruation is over.

At menarche, the ovaries weigh only 40% of their mature weight. The ovaries continue to develop and grow. Due to the instability of ovarian function and regulation, menstruation may not occur regularly every month within half a year to a year after menarche. After menarche, some women may have their second menstruation after several months, half a year or even a year. This is not a pathological phenomenon and menstruation will occur on time every month in the future. Each menstrual bleeding lasts about 5 days, which is the menstrual period.

Generally, the menstrual volume is 10 to 100 ml, with an average of 50 ml. The heaviest bleeding occurs on the second and third days. During menstruation, due to pelvic congestion, you may sometimes experience dizziness, craving for popsicles, mild abdominal pain, back pain, breast swelling, and poor appetite. These are all normal phenomena.

The reference information provided above is expected to help girls of this age better understand menarche and be mentally prepared for such changes in their bodies. Of course, this is only a reference range. Each person's physical condition and environment, including nutritional status and living atmosphere, will also have an impact on the onset of menarche. In short, you need to have enough understanding and pay attention to your own menarche.