Abstract
Infertility is typically defined as the inability to conceive after unprotected intercourse for at least 1 year. Approximately 15% of couples attempting their first pregnancy meet with failure during that time.1 Surveys of infertility have shown that approximately one-third of infertility is due solely to a male factor and another 20% results from combined female and male factors.2,3 Thus a male factor is either the exclusive cause or a contributory cause of infertility in approximately 50% of all infertile couples. Consequently, a systematic, rational, comprehensive approach is mandatory to exclude all possible correctable causes of male infertility.
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