Chokkaiyan, Saranya, Sendhil Coumary Arumugam, Saravana Kumar, Lopa B John, and Seetesh Ghose. 2017. “Periodontitis As a Risk Factor for Preterm Labour and Low Birth Weight Among Pregnant Women Attending a Tertiary Care Teaching Hospital”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 4 (6):1804-10. https://doi.org/10.18203/2320-1770.ijrcog20151264.