If you have not had your period for one month after miscarriage, it may be due to partial embryo residue, uterine cavity adhesions, emotional factors or re-pregnancy, and patients are advised to go to the hospital in time to identify the causes through ultrasound for targeted treatment. 1. Emotional reasons: If there is mental stress, depression and other adverse emotional effects after miscarriage surgery, it will lead to endocrine disruption, thus affecting the onset of menstruation. Patients should adjust their emotions in time after the operation to avoid excessive sadness or anxiety; 2, part of the embryo residue: if the embryo residue is caused by the abortion surgery is not completely successful, the blood HCG level in the body is still high, it will lead to no menstruation, you need to go to the hospital to further clarify the diagnosis, do an ultrasound examination, if the embryo residue is diagnosed, you need to carry out clearance surgery for treatment; 3, uterine cavity adhesion: abortion surgery may It is necessary to observe the recovery of the uterus through ultrasound, and the symptoms can be relieved through hysteroscopic adhesion decomposition if uterine cavity adhesions occur; 4.Pregnancy again: if you have intercourse without contraception after abortion, you will have menopause if you are pregnant again. If you are pregnant, it is recommended to consult your doctor for advice on birth control. After miscarriage, you should strengthen nutrition, avoid strenuous exercise, and try to use shower to avoid retrograde infection caused by tub bath, which will affect the recovery of the body. It is also important to avoid sexual intercourse for 1 month after miscarriage surgery and to follow up regularly to prevent other adverse complications.