Garg, S., Kaur, T., Saran, A. S. and Yadav, M. (2017) “A study of etiology and outcome of preterm birth at a tertiary care centre”, International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 6(10), pp. 4488–4491. doi: 10.18203/2320-1770.ijrcog20174429.