For women whose menstruation is sometimes early and sometimes delayed, it is often necessary to consider that the performance is caused by ovulation sometimes early and sometimes pushed back, which may be caused by physiological factors or pathological factors, the details are as follows: 1. Physiological factors: as long as the menstruation is advanced or pushed back within one week, it is a physiological performance, which may be related to the environment of the woman’s life, her physique, as well as due to stress, staying up all night and other causes. Physiological factors: As long as menstruation is advanced or pushed back within one week, it is a physiological manifestation, which may be related to women’s living environment, physical condition, stress, late night and other reasons, so for women who have menstruation in advance occasionally, or have menstruation pushed back occasionally, there may be no need to do special treatment.2. Pathological factors: If a woman’s menstruation has been advanced for more than three months in a row, and each time it is advanced for more than seven days, it is most likely to be caused by the abnormal manifestation of endocrine disorders of the ovaries.