Generally need 30-40 days after abortion may have menstrual flow, so 30 days after abortion is not yet menstrual, usually belongs to the normal situation, mainly related to hormone secretion, endometrial damage, endometrial growth is slow, as follows: 1, hormone secretion: because abortion will affect the secretion of estrogen in the female body and the normal metabolism of endocrine, prone to menstrual disorders, resulting in abortion after There may be no menstrual flow for about 30 days; 2, endometrial damage: after the abortion surgery damages the endometrium, it may affect the endometrial growth, change the normal menstrual cycle, causing menstrual irregularities and delayed menstruation; 3, slow growth of endometrium: if the patient is under too much pressure, it may lead to endocrine disorders, causing slow growth of endometrium, and delayed menstruation may occur. All of the above reasons can lead to no menstruation for about 30 days after abortion. Patients do not need special treatment for the time being, and menstruation can return to normal after the uterus gradually recovers its function. If there is still no menstruation in the second menstrual cycle, a hospital visit is needed to find the cause. In addition, women should pay attention to relaxation, avoid long-term stressful environment, pay attention to a light diet, develop good rest habits, ensure sufficient rest, pay attention to warmth, can properly promote the menstrual flow.