30-39 is a wide range in the grand scheme of things, even though they're all in the 30s age bracket.

For several men, 35 tends to be a major cut-off; Even 30 is pushing it for other men.

There are 40-year-old women in better shape and overall health than their 25-year-old peers, so age is not the only consideration to make.

Nonetheless, age matters, particularly if childbearing is in the works.