What's wrong with a girl's period?

If there is a history of sexual life of women show no menstruation, first of all to rule out pregnancy. Can use urine early pregnancy test paper or to the hospital to check HCG blood to determine whether pregnant. If there is a recent abortion or curettage, to check whether there are uterine adhesions or cervical adhesions caused by menstruation does not come. In addition, menstruation did not come to check the six sex hormones, there may be endocrine disorders caused by, such as mental stress, work pressure, excessive diet and environmental changes will cause menstrual delay. If adolescent girls over 16 years old do not come menstruation, need to do B ultrasound to understand the development of uterine accessories, blood test sex hormones or chromosomes.