Saber Abd-Allah, Mai M Raslan, Hanaa Suliman, Tamer Essam, and Heba F Salem, “Preparation of progesterone nanoparticles and evaluation of its effect on the capacitation of Bovine spermatozoa used in the in Vitro Fertilization”, ijdd, vol. 9, no. 4, pp. 125–131, Dec. 2017.