El Fattah, I.A.A. 2017. Using phytoestrogens as aprophylaxis against irregular uterine bleeding possibly occurring while using Depot-medroxyprogesterone acetate (DMPA) as a contraceptive method. International Journal of Reproduction, Contraception, Obstetrics and Gynecology. 3, 4 (Feb. 2017), 977–981.