Mariappan, G.R., Panchaksharayya, H.B. and R., G. 2020. Placental thickness as a sonographic biomarker for gestational age among singleton pregnancies. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 9, 11 (Oct. 2020), 4617–4620. DOI:https://doi.org/10.18203/2320-1770.ijrcog20204821.