Elmahdy, M., Elmarsafawy, A. and Elkafash, D. (2017) “Association between helicobacter pylori infection and hyperemesis gravidarum”, International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 5(9), pp. 3175–3180. doi: 10.18203/2320-1770.ijrcog20163007.