Ghani, Afroza, et al. “Prediction of Gestational Age by Last Menstrual Period (LMP) in Comparison to Ultrasonography (USG)”. Journal of Shaheed Suhrawardy Medical College, vol. 6, no. 2, Mar. 2017, pp. 82-86, doi:10.3329/jssmc.v6i2.31776.