Muhammad Owais Ahmad , Umay Kalsoom,Inam-ul-Haq (2015) “Comparative Study of Sperm Concentration in Pakistani Men”, Journal of Rawalpindi Medical College. Rawalpindi, Pakistan, 19(2). Available at: https://journalrmc.com/index.php/JRMC/article/view/283 (Accessed: 8 December 2025).