When you have sex after pregnancy, you can ejaculate inside the vagina, but you must pay attention to the hygiene of your sexual life. Before having intercourse, both spouses should wash their vulva and external genitalia to avoid the possibility of intrauterine infections caused by pathogenic bacteria. In addition, you should not have sex during the first 3 months of pregnancy, or during the second 3 months to avoid the possibility of preterm miscarriage or preterm birth, or intrauterine infection of the fetus. In the middle of pregnancy, sex should not be too frequent, so that the stimulation of sex will not cause contraction of the uterus and cause the fetus to lack oxygen in the uterus, so it is necessary to moderate sex.