Intercourse in the first month of pregnancy has certain risks for both the fetus and the mother, which may lead to infection, miscarriage, abnormal fetal development and other risks. 1, infection: the immunity of the female body will decrease after pregnancy, and the high level of estrogen in the body will change the internal environment of the vagina, which will easily breed bacteria, and intercourse will easily cause pathogenic infections and inflammation, such as vaginitis and cervicitis in women; 2, miscarriage. The embryo is unstable in the first month of pregnancy, the level of progesterone is low, the pregnant woman’s uterus is in an excited state during intercourse, which can easily induce contraction of the smooth muscle of the uterus and increase the probability of pre-eclampsia miscarriage, pregnant women should avoid sex in early pregnancy; 3, abnormal fetal development: if vaginal infection occurs after intercourse, the inflammation goes up into the uterine cavity, which may lead to fetal disease, slow growth and development or even malformation; 4, other: in the pregnancy In the early stages of pregnancy, intercourse may induce pelvic congestion when the action is too intense, leading to abdominal pain in women. The first three months and the second three months of pregnancy are high-risk periods, during which you should not have intercourse. During pregnancy, it is important to maintain a good routine and a balanced diet, and not to eat blindly. Avoid bad habits such as alcohol and smoking, keep a tidy environment and ensure your own health and hygiene, especially vaginal hygiene.