"...It’s not just mothers who are getting older, and it’s not just women who fret over the perfect age to start a family, or who face fertility problems and birth complications. It’s men too. The biological clock exists for all of us.
"'There are several reasons I’m concerned,' says Alexander, explaining his own mounting stress. 'One reason is social. As my friends started to have kids, well, the socialization patterns are dictated by children, and if you don’t have kids of the same age it’s hard to hang out; it’s hard to be on the same schedule.'
"He says he’s also anxious about longevity, given that his dad died at 66. 'Just from a mortality perspective,' he’d like to have a child soon. Then there’s his energy level, which he says he’s already seen go down. 'You want to play with your kids, and as you get older it's hard to necessarily do that—and you might not have the same vivacity to run around for a few hours that you might have had when you were younger.'"