The hazards of coitus in early pregnancy include bleeding, infection, etc. In serious cases, it may also cause preterm abortion, jeopardizing the health of the pregnant woman and the fetus. Early pregnancy refers to the twelve weeks of pregnancy, in this period of coitus will bring a lot of harm to women, the common is bleeding, if the coitus action will be violent damage to the vaginal mucosa, which will lead to bleeding. At the same time, coitus is also easy to bring external bacteria into the vagina, thus causing female genital infections, increasing the chances of vaginitis, pelvic inflammatory disease and other diseases. As women in early pregnancy, the embryo is still unstable, coitus may lead to uterine contraction, which will increase the chances of preeclampsia, usually manifested as vaginal bleeding, lower abdominal pain and so on. Therefore, it is not advisable to have intercourse in early pregnancy, and if everything is normal in mid-pregnancy, you can have intercourse appropriately. If you accidentally have intercourse in early pregnancy, you need to pay more attention and observe yourself whether there are abnormalities, if there is vaginal bleeding, abdominal pain and other symptoms, you must go to the hospital in time to check, to rule out the chances of preeclampsia, and comply with the doctor’s instructions to deal with the treatment.