The U.S. Birth Rate Just Hit a Record Low. Here Is What the CDC Numbers Actually Show

The United States recorded its lowest fertility rate on record in 2025, according to final birth data released this week by the Centers for Disease Control and Prevention. But the headline number hides the more important story: American women are not simply having fewer children. They are having them later.

The report, from the CDC’s National Center for Health Statistics, counts 3,612,012 births in 2025, down less than 1% from 3,628,934 the year before. The general fertility rate, the number of births per 1,000 women ages 15 to 44, fell 1% to 53.2.

1. The decline is concentrated among women under 30

Every age group under 30 had a lower birth rate in 2025 than in 2024. Every group from 30 to 44 had a higher one.

Women ages 30 to 34 now have the highest birth rate of any age group, ahead of women 25 to 29. That reflects a long-running pattern of Americans finishing school, settling into work and partnering later before having children.

2. Small percentages add up to real numbers

A 1% drop sounds minor. In practice, 2025 had about 16,900 fewer births than 2024. Because each year’s births become a future kindergarten class, workforce and tax base, demographers watch these changes closely even when they are small, and they compound when they repeat year after year.

3. Teen births keep falling fast

The birth rate for teenagers ages 15 to 19 fell 7% in one year, to 11.7 births per 1,000. Births to girls ages 10 to 14 also declined. The steady decline in teen births is one of the main reasons the overall fertility rate keeps sliding, and public health researchers broadly count it as a positive development.

4. Prenatal care improved

The share of mothers who began prenatal care in the first trimester rose to 76.3% from 75.5%. The increase held for mothers in every age group under 40. Early prenatal care is linked to healthier pregnancies, which makes this one of the more encouraging lines in the report.

5. C-section rates held steady, but rise sharply with age

The cesarean delivery rate was 32.4% in both 2024 and 2025. It varies widely by age: about 19% for mothers under 20 and about 48% for mothers 40 and older. As more births shift toward women in their 30s and 40s, that age pattern is worth watching for hospitals and families planning a pregnancy later in life.

What this means for the country

The U.S. total fertility rate has been below the 2.1 replacement level for years; the CDC’s provisional 2024 report put it at about 1.6 children per woman. A low fertility rate does not mean the population is shrinking right away, since births still outnumber deaths and immigration adds to the population. Over time, though, fewer births mean smaller school enrollments, a smaller future workforce and fewer workers supporting each retiree through programs such as Social Security.

The data also shows what policymakers are up against. The trend is not driven by one group or one year. It reflects decades of change in when people marry, how long they study, what housing and child care cost, and how many teenagers become parents.

What the report does not tell us

• Why the rate fell. The report measures births; it does not survey people about their reasons.
• State and racial breakdowns. The CDC says those details are available in its annual natality files and the CDC WONDER database, not in this summary.
• A 2025 total fertility rate. This brief does not publish one.

One more detail for careful readers: the CDC’s provisional count, released in April, was 3,606,400 births. The final count is higher, 3,612,012, because more records were processed. Rates in the final report are slightly different for the same reason.

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