Zareian, M. A., Nejatbakhsh, F., & Tabarrai Arani, M. "Importance and methods of treating pregnancy constipation in conventional medicine and comparison with traditional medicine", The Iranian Journal of Obstetrics, Gynecology and Infertility, 19, 40, 2017, 19-32. doi: 10.22038/ijogi.2017.8444