Book excerpt: Dr. Harry Fisch, a leading expert in male infertility, shares groundbreaking information about the bodily and behavioral changes that happen over the course of a man’s lifetime. Busting the myth that men don’t have biological clocks, Dr. Henry Fisch emphasizes that even young men can have testosterone levels as low as those of much older men, leading to infertility, sexual problems, and other serious health issues. Every couple should know all the risks and issues facing men, because these affect two of the most important things in their life: their ability to have children and their capacity to have good sex. The Male Biological Clock is a must read for every man and every couple who is struggling to have children or improve their sex life. Many of Dr. Harry Fisch's findings are startling—beginning with the fact that infertility is not mostly a women's problem—and he offers many helpful suggestions for how to deal with declining testosterone, changing sexual needs, and the fertility industry. The Male Biological Clock tells you what you need to know and how you can achieve optimal fertility and sexuality.