Alddin, N. N. S., Al-Dujaily, S. S., & Al-Sultani, Y. K. (2013). In vitro sperm activation with pentoxifylline and L-carnitine for infertile men semen using layering and sedimentation techniques. Iraqi Journal of Embryos and Infertility Researches, 3(2), 26-31. https://doi.org/nan