Kumar, R., Ghoshal, I., Razab, S., BS, V. and Prabhu RV, K. 2017. Association of serum nitric oxide, free beta human chorionic gonadotropin and body mass index in first trimester pregnancy. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 5, 7 (Feb. 2017), 2287–2290. DOI:https://doi.org/10.18203/2320-1770.ijrcog20162112.