Does not come all the time menstruation is how to return a responsibility

There are many reasons for not coming to menstruation all the time: 1. Irregular menstruation, because of emotional changes or high pressure of work and study, the external environment causes endocrine disorders, so it causes not coming menstruation all the time;2. There may be problems with ovarian function, ovarian function decline, amenorrhea caused by premature ovarian failure;3. Pregnancy caused by pregnancy, has not come to menstruation to test pregnancy, to see whether it is caused by pregnancy;4. Related to drugs, such as taking emergency contraceptives, it will interfere with menstruation; 5, some people are polycystic ovary syndrome, because no ovulation or rare ovulation, so a few months do not come menstruation. Specific is what kind of situation, you can go to the hospital to check sex hormones, but also test early pregnancy rule out pregnancy. Can do B ultrasound, see the thickness of the endometrium. Sometimes do not come menstruation, but also with uterine adhesions.