RT Book, Section A1 Walsh, Thomas J. A1 Smith, James F. A2 McAninch, Jack W. A2 Lue, Tom F. SR Print(0) ID 56952028 T1 Chapter 44. Male Infertility T2 Smith & Tanagho's General Urology, 18e YR 2013 FD 2013 PB The McGraw-Hill Companies PP New York, NY SN 978-0-07-162497-8 LK accessmedicine.mhmedical.com/content.aspx?aid=56952028 RD 2024/04/24 AB Infertility is defined as the failure to conceive despite 1 year of regular unprotected intercourse. Approximately 15% of couples will experience infertility, and of these, 20% will have a male factor that is solely responsible; male factors will contribute in an additional 30% of cases. In general, male infertility is identified by abnormalities on a semen analysis; however, other issues can contribute to infertility despite normal semen.