1. Pritchard JA, MacDonald P, Gant NF. William’s obstetrics. Norwalk: Appleton- Century-Croft; 1985. p. 17.
2. Tharpe N. Postpregnancy genital tract and wound infections. J Midwifery Womens Health. 2008;53(3):236–46.
3. Yang M, Kan QW. Observation of the effect of prophylactic antibiotics in perioperative period of episiotomy. Hainan Med J. 2012;23:64–5.
4. Zheng HJ. Feasibility analysis of non-prophylactic use of antibiotics for vaginal delivery in spontaneous delivery. Strait Pharm J. 2013;25:244–5.
5. Ould F. A treatise of midwifery. Dublin: Nelson and Connor; 1742.