Elnagar, Reham Raafat, Hanan Awad M Elmashed, and Nahed Fikry Haasan Kheder. 2017. “Menstrual Disorders: Incidence and Its Effect on students’ Academic Performance”. International Journal of Nursing Didactics 7 (3):27-37. https://doi.org/10.15520/ijnd.2017.vol7.iss3.199.27-37.