If you've put off starting a family, you're not alone.
In the U.S., the average age a woman gives birth to her first child has been rising. And, a study published Thursday in Human Reproduction shows dads are getting older, too.
In 1972, the average age of fathers of newborns in the U.S. was 27. Now, it's closer to 31 years old (30.9 years to be specific), the study finds.