How long does a child's menstrual period usually last?

We know that girls will have their first menstruation after the age of thirteen or fourteen, and menstruation is a sign of girls' maturity. For minors, their menstruation is somewhat different from that of adults, which may manifest as a longer or shorter cycle. Girls should have some knowledge of sexual knowledge so as to ensure their physical health and avoid a lot of unnecessary troubles. So, how long does a girl’s menstruation usually last?

1. A girl’s first menstruation is called menarche. Most girls have their first period between the ages of 12 and 14. Before the onset of menstruation, girls' breasts have begun to grow, their height has suddenly increased, and some have already grown pubic hair 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.

2. At the beginning of menstruation, the weight of the ovaries is only 40% of that at maturity. 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.

3. Generally, the menstrual volume is 10 to 100 ml, with an average of 50 ml. The amount of bleeding is highest 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.