Raval, B.M., Sisodiya, V.P., Yadava, P.A., Mehta, S.T., Patel, S.R. and Dadhania, B.H. 2020. Measurement of cervical length using transvaginal sonography for prediction of preterm labour. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 9, 11 (Oct. 2020), 4471–4476. DOI:https://doi.org/10.18203/2320-1770.ijrcog20204795.