Gupta, Ritika, Priyanka Mukherjee, Harpreet Kaur, and Sahil Singhal. 2020. “Role of Cervicovaginal β-HCG in Prediction of Preterm Delivery: A Prospective Observational Study”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology 9 (9):3677-82. https://doi.org/10.18203/2320-1770.ijrcog20203839.