S. M. Sayed, A. K. Khalifa, N. A. E. F. Abd Allah Shehata, M. A. Eweis, and S. M. Shawky, “Predominance of fetal malformations among pregnant women: A multi-centric observational study”, Clin J Obstet Gynecol, vol. 4, no. 2, pp. 055–059, Apr. 2021.