In terms of fertility, it doesn't matter if you start trying to get pregnant in your early 20s or your late 20s.

http://www.babycenter.com/0_age-and-fertility-getting-pregnant-in-your-20s_1494692.bc

In terms of fertility, it doesn't matter if you start trying to get pregnant in your early 20s or your late 20s, according to Judith Albert, a reproductive endocrinologist and scientific director of Reproductive Health Specialists, a fertility center in Pittsburgh, Pennsylvania.