It is possible to have intercourse about 6 weeks after a normal delivery with lateral incision. Lateral incision is suitable for the case that the head of the fetus is too big and cannot be delivered smoothly. After the lateral incision, stitches are needed, and the patient can remove the stitches after 7 days. The wound of the lateral incision has healed in 7 days, but at this time the uterus has not fully recovered and there is bad discharge, so it is not recommended that the patient have intercourse. Usually after 6 weeks after giving birth to a baby, the physical condition is good, when the uterus can be fully restored to the pre-pregnancy state, coitus will not cause harm to the maternal body. It is recommended to have an ultrasound examination after 6 weeks to clarify whether it is possible to have intercourse, taking into account the results of the ultrasound examination and the patient’s recovery. If the ultrasound examination is done at 42 days and the uterus has not fully recovered, coitus is also not allowed, so as not to cause pelvic inflammatory disease or uterine prolapse disease. In addition, postpartum mothers need to maintain a relaxed mood, can carry out appropriate professional exercise, in order to promote the body to recover as soon as possible.