Age at menarche and menstrual cycle pattern among schoolgirls in Kassala in eastern Sudan
Abdel Aziem A. Ali1, Duria A. Rayis2, Mona Mamoun1 and Ishag Adam2*
1Faculty of Medicine, Kassala University, Sudan.
2Department of Obstetrics and Gynecology, Faculty of Medicine, University of Khartoum, Sudan.
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