The first trimester intercourse needs to be observed to see if there are abnormalities, if there is abdominal pain, bleeding and other conditions, you need to go to the hospital in time for ultrasound examination to see the development of the fetus, consider the intercourse caused by the aura of miscarriage. If the fetus develops normally through the examination, you need to rest in bed, and it is recommended to take progesterone and other drugs to protect the fetus, and also need to eat more fish, shrimp, lean meat and other foods to prevent miscarriage, if there is no abnormal phenomenon after intercourse, and the fetus develops normally, this does not need to be treated, pay attention to regular maternity checkups. In the early stages of pregnancy, the body resistance is low, if the intercourse does not pay attention to hygiene at this time will easily cause vaginitis, you can carry out routine examination of the leukorrhea, gynecological inflammation need to be treated in a timely manner with drugs such as diazotide pessary, clotrimazole pessary, usually pay attention to vulva hygiene, wash with warm water and diligently change underwear, etc.