The reasons for not having a period for a month are usually the following: First, it may be caused by pregnancy, if the normal menstrual cycle is projected, women who have not had a period for more than a week may have the possibility of pregnancy, it is recommended to carry out preliminary testing by means of a pregnancy test, if the test paper becomes two bars, it means that it is pregnant. Second, the existence of menstrual disorders, women’s menstruation delayed more than 7 days is not normal, if a month did not have a period, there may be endocrine disorders or estrogen secretion deficiency, it is recommended to go to the regular hospital for examination, and under the guidance of the doctor to take motherwort pellets to improve menstruation problems. Thirdly, the delay of menstruation caused by excessive pressure in life, some women are under pressure in daily life, irregular work and rest time, which will directly affect the timely onset of menstruation, it is recommended to relax, develop good living habits and timely supplementation.