The biological clock ticks for men too.
The notion that age-related fertility decline is only a female factor has been debunked by a recent British study. Researchers at Bristol and Brunel Universities evaluated 8,500 couples to determine the impact of age on the length of time it took to conceive. They discovered that while only 8 percent of men younger than 25 fail to impregnate their partner after a year of trying, that number grows to 15 percent after age 35. Despite other factors, such as the fact that frequency of intercourse drops off with age, the study suggests that paternal age, too, may be a consideration for couples struggling with infertility.