The hazards of 3-month miscarriage are as follows: First, it is easy to cause intrauterine infection, miscarriage after 3 months of pregnancy accompanied by bleeding, bleeding can easily lead to infection of the uterus and the vagina and pelvis, etc. Secondly, it is easy to cause anemia. Pregnant women will have certain bleeding when they miscarry, which may cause mild anemia. Third, the damage to the uterus, 3 months of the fetus is large, miscarriage will lead to a certain degree of damage to the endometrium, if the problem is serious may make it difficult for women to get pregnant again, or even unable to get pregnant. Fourthly, it has a negative impact on women’s psychology and spirit. Some women experience depression, insomnia, anxiety and many other psychological and mental problems after abortion. Fifthly, it has a negative impact on women’s reproductive system, causing damage to the uterus, ovaries, fallopian tubes, etc.