I’M SORRY, I THOUGHT THAT BIOLOGY WAS A SOCIAL CONSTRUCT:. “Peak fertility occurs in a woman’s twenties. While women can give birth for about 30-35 years, the best chance of carrying a healthy baby to term is between ages 23 and 28, says world-renowned fertility specialist David Adamson, founder and Chief Medical Officer at ARCFertility. As a woman ages, the eggs available to make a baby have an increased chance of miscarriage or genetic problems. Think you have plenty of time? You actually don’t. Because peak fertility ends at age 31.”