First-trimester abortion has certain hazards. If it is not operated properly and cared for properly, it may cause uterine adhesion, habitual abortion, and even secondary infertility in serious cases. 1. Uterine cavity adhesion: the uterus is damaged by pregnancy or other factors to the endometrial basal layer, the uterine cavity partially or completely adherent, endometrial fibrosis, and thus lead to menstrual abnormalities, infertility, or repeated miscarriages and so on. Uterine cavity adhesion is not typical symptoms, may be manifested as low menstrual flow, dysmenorrhea, or even menopause, and some patients may be infertile or repeated miscarriage. Therefore, after abortion, we must follow the doctor’s instructions to take medication, prevention of infection, regular review, surgical recovery period need contraception, abnormal vaginal bleeding, accompanied by acute pain immediately consult a doctor. 2. Habitual abortion: refers to three or more consecutive spontaneous abortions are called habitual abortion. Each miscarriage often occurs in the same month of pregnancy, and the process of miscarriage is the same as that of general miscarriage. Clinical symptoms are vaginal bleeding, vague pain in the lower abdomen, cervical dilatation and so on. So with the increase in the number of miscarriages, the probability of having another miscarriage rises significantly, so first-trimester miscarriages should still be considered carefully. 3. secondary infertility: refers to women who have had a previous pregnancy, and then one year without contraception, called secondary infertility, the cause of the disease is mainly related to the reproductive system diseases, the environment, repeated abortions and other factors, so the first-trimester miscarriage is likely to lead to secondary infertility. If you have any other questions, it is recommended to consult a professional doctor for guidance.