TY - CHAP M1 - Book, Section TI - Chapter 45. The Aging Male A1 - Smith, James F. A1 - Walsh, Thomas J. A2 - McAninch, Jack W. A2 - Lue, Tom F. PY - 2013 T2 - Smith & Tanagho's General Urology, 18e AB - The proportion of individuals older than 65 years will rise significantly over the next 25 years. According to US census data, the number of Americans older than 65 years will rise from approximately 35 million today (12.4% of all Americans) to nearly 55 million in 2020 (16.3% of total), and nearly 87 million in 2050 (20.7% of total). As a consequence, the health care system will likely experience a dramatic increase in age-related health problems, such as cancer, cerebrovascular and ischemic heart disease, and hormone deficiency. A substantial body of literature supports the assertion that hormonal changes in the aging male can be associated with significant health problems. This chapter reviews the epidemiology of testosterone deficiency in older men; alterations in testis biology that occur with age; and the effects that these changes may have on semen quality, fertility, birth defects in offspring, and on the overall health of older men. SN - PB - The McGraw-Hill Companies CY - New York, NY Y2 - 2024/03/28 UR - accesssurgery.mhmedical.com/content.aspx?aid=56952777 ER -