Mungamuru, S., and S. Munivenkatappa. “Correlation Between Gestational Age of the Foetus and Ultrasonographic Placental Thickness”. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, vol. 13, no. 11, Oct. 2024, pp. 3224-8, doi:10.18203/2320-1770.ijrcog20243181.