Age American Women Have Their First Baby Continues To Rise: Smaller Families And Lower US Birthrates Likely

From "Average Age of First-Time Moms in U.S. Still Rising: CDC: Delaying pregnancy means smaller families and implications for overall population, expert says" on MedlinePlus:

The average age that American women have their first baby continues to rise, U.S. health officials reported Thursday.

From 2000 to 2014, the age of first-time mothers increased 1.4 years -- from 24.9 years old on average to 26.3 years, according to a new report from the U.S. Centers for Disease Control and Prevention.***Delaying parenthood can have broad implications for maternal and child health as well as population growth, [T.J.] Mathews [a demographer at the CDC's National Center for Health Statistics] said.

"The average is going up for mothers, which is likely to delay childbearing, and if you delay you are more likely to have fewer births, and that has ramifications for our overall population," Mathews said.