If you have intercourse half a month after a cesarean section it can easily lead to infection as the uterine opening may not be fully closed, and oral antibiotics can be taken at this time to prevent infection. If you are breastfeeding, you can only take cephalosporin or amoxicillin orally for 3-5 days. If you are not breastfeeding, you can also take Chinese medicines, such as Gongyanping Drops Pills or Gynecological Yankang Soft Capsules, to prevent pelvic inflammatory disease. It is recommended to come to the hospital more than 42 days after cesarean section to do postpartum review, such as review ultrasound, TCT, HPV and other cervical cancer prevention tests, leukorrhea routine. The results are normal before coitus, and should be strictly good contraceptive measures, because two years after the cesarean section can not prepare for pregnancy.