Objectives: Comparison of fertilization, embryo quality, pregnancy and implantation rates between two sperm separation procedures, density gradient centrifugation (DGC) and Magnetic-Activated Cell Sorting (MACS), followed DGC (MACS-DGC) in infertile men candidates for intra-cytoplasmic sperm injection (ICSI).
Design: Infertile couples with primary male factor who referred to Isfahan fertility and infertility center infertility were included in this study. These individuals were informed about the study and were grouped into study (MACS-DGC) and control (DGC).
Setting and conduct: In the day of ICSI operation, a total of 113 infertile individuals were randomly assigned (in a 1:1 proportion) to MACS-DGC and DGC groups. In study group, the oocytes were inseminated with sperm selected by MACS-DGC processing. In DGC group, oocytes were inseminated with sperm selected by DGC method (based on viability and morphology).
Major Inclusion and Exclusion criteria: Inclusion criteria: Primary male factor infertility (according to the WHO criteria, 2010); with mean age of 20-45. Exclusion criteria: Females factor infertility based on WHO criteria (2010); age higher than 35 years; less than 6 oocytes and poor quality oocyte.
Intervention: In study group, all oocytes were inseminated with sperm selected with DGC following MACS processing (separation of intact spermatozoa from those which present apoptotic markers), while in the control group, only routine sperm preparation procedure (DGC) were used.
Main outcome measures (variables): In this study, fertilization, embryo quality, implantation and pregnancy rates were compared between two groups. The number of embryos transferred to each patient on day 3 was based on female age, number of previous failed cycles and quality of embryos at the time of embryo transfer and final decision made by the gynecologist. Clinical pregnancy was defined by ultrasonography findings showing at least one embryo with a fetal heartbeat, 5 weeks after transfer. Implantation rate was defined by the number of observed gestational sacs per number of transferred embryos.