Ask not for whom the biological clock ticks, dude. Slate
human nature: Science, technology, and life.
The Male Biological Clock
Procreate by 40 or you'll start shooting blanks.
By William Saletan
Updated Friday, May 26, 2006, at 7:27 AM ET
"Men start losing their fertility at age 40. In a study of more than 1,900 couples, irrespective of the woman's age, IVF attempts involving men 40 or older failed 70 percent more often than IVF attempts involving men younger than 30. Previous theory: Older men produce fewer kids because they get less sex. New theory: Older men produce fewer kids because they shoot more blanks. Feminist takes: 1) Ladies, stop blaming yourselves for IVF failure. 2) Ask not for whom the biological clock ticks, dude."
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