Gupta, R., Mukherjee, P., Kaur, H., & Singhal, S. (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), 3677–3682. https://doi.org/10.18203/2320-1770.ijrcog20203839