When is your period coming?

Menstruation is usually medically said menstruation, generally an important sign of female reproductive maturity, refers to the periodic regulation of ovarian hormones, endometrial periodic shedding and bleeding. Menstruation is called menarche, age can be affected by a variety of factors, such as environment, climate, health status, etc. will affect the time of menarche, but most will be between 13-15 years old. Of course, there are also early, because the current child development early, some will come early menarche, menarche in 10-12 years old, but the latest will also show menarche in 17-18 years old. Menarche from the first day, between two menarche called a menstrual cycle, normal in 28-30 days, about fluctuations in 21-35 days, are more regular. If menarche, teenage girls just started menstruation, the first 1-2 years may show that menstruation is not very regular or menstrual sparse, such as 2-3 months to once, if it does not affect the child's learning status does not need to see a doctor, waiting for the growth of age, hypothalamic-pituitary-ovarian axis gradually perfect menstruation will gradually become regular. However, if menstruation occurs frequently, menstruation often occurs, life or study is affected, vaginal bleeding and other manifestations must be seen in time.