Hassan, W., Abu-Helalah, M., Salam, A., Elhakim, A., Bayazeed, H., Latif, S., & Rehmani, R. (2017). Incidence of early pregnancy bleeding in the Eastern region of Saudi Arabia. International Journal of Reproduction, Contraception, Obstetrics and Gynecology, 5(5), 1392–1399. https://doi.org/10.18203/2320-1770.ijrcog20161292