A. N. Onyiriuka, “Twin Birth Order, Birthweight and Birthweight Discordance: Any Relationship?”, Nepal J Obstet Gynaecol, vol. 6, no. 1, pp. 46–50, Aug. 2011, Accessed: Jul. 18, 2026. [Online]. Available: https://nepjol.info/index.php/NJOG/article/view/5252