Those "perilous" baby-making years after 35 we've all been taught to fear are actually not so scary. In fact, Twenge points out that somewhere around 80 percent of women from ages 35 to 39 get pregnant naturally within a year—and that percentage is even higher for those who already have kids.
So what about those studies everyone's been citing for years now? The ones that have us imagining our eggs suddenly disappearing on the eve of our 35th birthdays? Apparently, there's really only been one such study so far. And it's way outdated. "The commonly cited statistic saying that 1 out of 3 women over 35 is infertile comes from a study of birth records from the 1700s in France," says Twenge. As for fertility after 40, it does dip; but only one study's explored this to-date, as well, and it revealed some promising stats: 60 percent of women between the ages of 40 and 43 became pregnant naturally, and all within six months.