Berry, S.D., Sood, R., Negi, K. and Kumar, N. 2020. Study of risk factors for preterm deliveries in a tertiary hospital. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 9, 7 (Jun. 2020), 3032–3036. DOI:https://doi.org/10.18203/2320-1770.ijrcog20202752.