Paternal age and reproductive outcomes in donor intracytoplasmic sperm injection cycles

Background: Advanced paternal age has emerged as a potential contributor to adverse reproductive outcomes, though its role remains less clearly defined than that of maternal age. Donor oocyte intracytoplasmic sperm injection (ICSI) cycles provide an ideal model to study paternal effects by minimizing oocyte-related confounding effect. Objectives were to evaluate the impact of paternal age on clinical pregnancy rate (CPR) and live birth rate (LBR) in donor oocyte ICSI cycles. Methods: This retrospective observational study analysed 101 donor oocyte ICSI cycles performed at Madras Medical Mission, Chennai from 2020 to 2025. Male participants were stratified into paternal age groups: 45 years and their outcomes in donor ICSI cycles studied. Recipient female partners ages were between 27 and 45 years. Statistical analysis was performed using chi-square tests, with p