If you have intercourse without knowing that you are pregnant, it is advisable to maintain local hygiene after intercourse and pay attention to cleaning to avoid pathogenic infections. Do not have intercourse within the first 3 months of pregnancy, and do not have intercourse in the last 3 months of pregnancy. The greatest clinical concern is that intercourse may cause irritation and contraction of the uterus, which may lead to miscarriage or premature birth, so do not have intercourse in the early and late pregnancy. It is recommended that even if you can have intercourse in the middle of pregnancy, you should moderate it properly and not have sex too often to avoid frequent contractions of the uterus, which may clinically cause lack of oxygen to the fetus in the uterus, so you should have a moderate sex life. In addition, if you have intercourse without knowing that you are pregnant, there is no need to be nervous if you are not uncomfortable, just pay attention to rest.