Infertility affects men and women equally. In couples experiencing infertility, approximately 35% is due to male factors, 35% is due to female factors, 20% of cases have a combination of both male and female factors, and the last 10% are unexplained causes.
For this reason, it is imperative that both the male and female are evaluated during the infertility work-up. For males this is a basic semen analysis, but may also include blood work to check hormone levels, chromosome analysis, and genetic screenings.