Acharya, Sumnima, Awadesh Tiwari, and Rupesh Sharma. “Placental Thickness and Its Correlation With Gestational Age: A Cross-Sectional Ultrasonographic Study”. Journal of Lumbini Medical College 6, no. 2 (December 21, 2018). Accessed March 29, 2024. https://www.nepjol.info/index.php/JLMC/article/view/23660.