Reproductive disorders affect men as much as women, and often both. The inability to reproduce is generally due to inborn factors; for example, some women have obstructed Fallopian tubes or have developed endometriosis, while some men have poor sperm quality.
The causes are multiple; 30% of cases are attributable to the woman and the same proportion to the man. They concern both partners in 30% of situations and remain unexplained in the remaining 10%.
Investigations therefore involve both partners.