Key Takeaways

Average life expectancy isn’t expected to reach 100 yearsGains made by wealthy countries in the first half of the 20th century have slowed significantlyPast gains were driven by reductions in infant death rates, which have now reached very low levels

THURSDAY, Sept. 4, 2025 (HealthDay News) — Bad news for folks hoping to become a centenarian: Average life expectancy isn’t expected to exceed 100 years anytime soon, a new study says.

Life expectancy gains made by wealthy countries in the first half of the 20th century have slowed significantly, researchers report in the Proceedings of the National Academy of Sciences .

As a result, none of the generations born after 1939 is expected to reach 100 years of age on average, researchers concluded.

“The unprecedented increase

See Full Page