lak, E.; Lak, E.; Hashemitabar, M. .; Afrogh, M. .; Nasirzadeh, K. .; Shamolaghamsari, F. . Comparative Study of Influence of Two Sperm Preparation, Swim up and Density Gradiant-Swim Up, on the Outcomes of Intrauterine Insemination (IUI) in Different Types of Semen Samples Infertile Men Referred to Infertility Research and Treatment Center, ACEC. rbms 2020, 24, e7.