alt Hacker NewsA material component of reduction in the US fertility rate has been avoided teen (15-19 cohort) pregnancies. ~40% of pregnancies both in the US and internationally, annually, are unintended (per the Guttmacher Institute and the UN, respectively).
Teen birth rates hit another historical low in 2025, CDC says - https://www.npr.org/2026/04/09/nx-s1-5777587/teen-birth-rate... - April 9th, 2026
Additional citation:
There's No Mystery To America's Fertility Decline - https://ifstudies.org/blog/theres-no-mystery-to-americas-fer... - June 30th, 2026 (“The U.S. fertility decline is shaped by many forces, but the data point to one primary driver: the collapse of childbearing among women in their 20s.”)