Soni, Sona, Bharti Singh, and Veena Agarwal. 2019. “Effects of Interpregnancy Interval and Outcome of Preceding Pregnancy on Present Pregnancy Outcome”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 8 (4):1655-61. https://doi.org/10.18203/2320-1770.ijrcog20191237.