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Worldwide, there is an increase in uptake of assisted reproductive technology (ART) treatment. The impact of paternal age on ART outcomes is unclear. In view of the conflicting results reported by studies evaluating effect of paternal age on ART outcomes, we planned a study to investigate the impact of advanced paternal age in couples undergoing ART for non-male factor infertility. We conducted a retrospective cohort study at a university-level teaching hospital in South India. All couples who underwent ART for non-male factor infertility were included. The couples were divided into two groups based on the age of the male partner. Group I included couples with male partner’s age less than 40 years, taken as reference group. Group II included couples with male partners age more than or equal to 40 years. The primary outcome was live birth rate. Secondary outcomes included clinical pregnancy, miscarriage, fertilization, embryo development, and blastulation rates. A total of 809 cycles were included for the study. Following exclusion of 39 cycles, 770 cycles were analyzed for outcomes. Group I comprised of 556 (72%) cycles and group II comprised of 214 (28%) cycles. There was no significant difference in live birth rate per embryo transfer between groups I and II (31.8% vs. 29.4%; odds ratio, OR, 0.89; 95% CI 0.63 to 1.26). After adjustment for potential confounders, the live birth rate did not differ significantly (adjusted odds ratio, aOR, 1.10; 95% CI 0.74 to 1.65). The clinical pregnancy (39.4% vs. 36%; aOR 1.06; 95% CI 0.72 to 1.56) and the miscarriage rates (18.3% vs. 15.6%; aOR 0.73; 95% CI 0.32 to 1.66) were also similar between the two groups. There was significant decrease in the blastulation rate (36.8% vs. 32.1%; P 0.002) in the advanced paternal age group as compared to the reference group. The current study suggests that in couples undergoing ART for non-male factor, there is no detrimental effect of increasing paternal age on treatment outcomes.

middle east fertility society journal/middle east fertility society journal 

Effect of paternal age on treatment outcomes in couples undergoing assisted reproductive technology for non-male factor infertility: a retrospective analysis of 809 cycles