Women often receive a lot of preferential treatment in their lives. Of course, there are many times because they are beautiful, but it must be said that in addition to the pressure of life, Yaoyao faces various physiological problems. The length of women’s menstrual period is caused by many factors. Whether it is excessive dieting, whether uterine surgery has been done recently, whether taking certain drugs may cause menstrual delay, and there are many reasons for delaying menstruation. The following are the most common cases. Kind of reason.