Older women are having more children. Younger women are not.

A Centers for Disease Control and Prevention report says teen births in the United States plummeted by 73% between 1990 and 2023 while births to women age 40 and older skyrocketed an astonishing 193%. The total number of births has declined 14%, mostly due to declining birth rates of women younger than 30, who once accounted for 70% of all births but now represent less than half. The share of babies born to mothers under 20 has fallen from one in 8 to just one in 25. The national fertility rate has dropped to 1.62 births per woman, well below the population level.