The fertility rate in the U.S. in 2016 was the lowest it's ever been, with just 62 births per 1,000 women aged 15 to 44, according to analysis from the National Center for Health Statistics cited by The New York Times.
That rate represents a 1 percent decrease from 2015.
Here are six additional findings from the analysis.
1. There were 3,941,109 babies born in 2016. The U.S. population is now under replacement level, but the population is not declining due to an influx of immigrants, according to the report.
2. In 2016, birthrates declined in younger women while rising in older women. Birthrates fell to record lows across all groups of women under age 30, according to the analysis. The decline was 4 percent for women ages 20 to 24, and 2 percent for women ages 25 to 29.
3. The decrease in birthrate among teenagers has declined by 67 percent since 1991. The decrease was 9 percent from 2015 to 2016.
4. Among women ages 30 to 34, the birthrate rose by 1 percent from 2015 to 2016 and by 2 percent for women ages 35 to 39.
5. Women ages 40 to 44 had 4 percent more babies in 2016 than 2015. Unmarried women had 3 percent fewer babies in the same timeframe.
6. Birthrates also differed by race: 28.4 percent of white babies' parents were unmarried in 2016, compared to 69.7 of black babies and 52.5 percent of Hispanic babies.