Ghali, H. A. A., Alnemr, A. A. A., Ibrahem, M. A. A. M., Abou Elkhair, A. A. H. (2020). 'Ultrasonographic Evaluation of the Yolk Sac Diameter and Shape in the First Trimester of Pregnancy and Its Relation to Pregnancy Outcome', The Egyptian Journal of Hospital Medicine, 81(2), pp. 1401-1405. doi: 10.21608/ejhm.2020.114440