Narenji, F., Delavar, M., & Rafiei, M. "Comparison the Effects of the Ginger Fresh Root and Vitamin B6 on the Nausea and Vomiting in Pregnancy", The Iranian Journal of Obstetrics, Gynecology and Infertility, 15, 2, 2012, 35-41. doi: 10.22038/ijogi.2012.5742