In the early stages of pregnancy, since intercourse, you need to pay attention to observation to see if there is lower abdominal pain, a small amount of vaginal bleeding, if there is no such a situation, you need to pay attention to appropriate rest, in the diet eat more easy to digest, light, nutritious food, in the short term, can not have sex again. If you have lower abdominal pain or a small amount of vaginal bleeding after intercourse, most of them are combined with the occurrence of preeclampsia, it is best to go to the hospital to do a checkup, if the blood HCG, progesterone value is in the normal range, the development of the gestational sac in the uterine cavity in line with the gestational week, the fetal heartbeat is good, there is no intrauterine hemorrhage, you can be given appropriate bed rest first. Give progesterone medication to preserve the fetus, and then do a review, women in the early stages of pregnancy, especially in the first trimester, need to prohibit coitus.