Mustafa, S. B., Elbashir, A. M., Waddad, A. Y., & Ibrahim, A. M. A. (2017). Placenta praevia in Najran University hospital: incidence and risk factors. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 6(5), 1758–1761. https://doi.org/10.18203/2320-1770.ijrcog20171561