Most population-based studies agree that infertility affects 15 to 20% of couples. It is the job of the reproductive medicine specialist to determine the unique cause of each couple’s challenge in establishing a healthy pregnancy. While sometimes the answer is quickly uncovered (failure to ovulate, blocked fallopian tubes, or the complete absence of sperm), many patients are faced with the difficult reality that their diagnostic workup has not produced a clear reason for their difficulty becoming pregnant.
This category of “unexplained infertility” is the reason why determining the incidence of male factor infertility is so difficult. We do know that a complete lack