Late menstruation and no pregnancy, may be endocrine disorders caused by the lack of menstruation. If menstruation does not come for more than 10 days or more than 10 days, it is recommended to go to the hospital for ultrasound examination to understand the thickness of the endometrium, if the endometrium is thicker, progesterone can be given to make menstruation, and to observe the situation of the next menstruation; if menstruation is not coming, hormone levels can be examined, to understand the function of the ovaries, whether there is ovarian premature failure, or polycystic ovary syndrome, and so on, some of the endocrine disorders caused by the lack of menstruation. Lack of menstruation. Generally speaking, if women of childbearing age do not have menstruation, the first thing to consider is whether it is caused by pregnancy, to rule out the absence of menstruation not caused by pregnancy, we should carry out the hormone level examination, if the examination suggests polycystic ovary syndrome, we should give timely and effective treatment, but we can not rule out the decline of the ovarian function of the older women, the absence of menstruation, can also be detected through the hormone level examination, to adjust menstruation treatment. Adjustment of menstruation treatment.