The average age of American women giving birth for the first time climbed to a record high of 26.3 in 2014—nearly four years greater than in 1980. Behind the rise in age at first birth is the increase in college attendance. The percentage of female high school graduates who enroll in college within 12 months of graduation climbed from half in 1980 to more than two-thirds today.
Average age at first birth
Source: National Center for Health Statistics, Births: Final Data for 2014, Supplemental Tables