Singleton births are births in pregnancies in which only one fetus is delivered live at any time during the pregnancy.
Gestational age can be classified as "preterm birth" when it occurs before 37 weeks of gestation, "early term" refers to births between 37 and 38 weeks, "full term" are between 39 and 40 weeks, and "late or post-term" encompasses 41 weeks and beyond.Â
Totals may not add to 100 because of rounding.
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U.S. percentage change in gestational age from 2014 to 2022, by age of mother
Between 2014 and 2022, the percentage change in gestational age for singleton births in the United States revealed consistent increases in preterm and early term births across each 10-year maternal age group. Additionally, there was a big decline in full-term and post-term gestation births across all analyzed age groups. This statistic depicts the percentage change in gestational age for singleton births in the United States between 2014 and 2022, by age of mother.
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CDC, & NCHS. (January 30, 2024). Percentage change in gestational age for singleton births in the United States between 2014 and 2022, by age of mother [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved July 31, 2026, from /statistics/1451404/us-percentage-change-in-gestational-age-by-age-of-mother/
CDC, und NCHS. "Percentage change in gestational age for singleton births in the United States between 2014 and 2022, by age of mother." Chart. January 30, 2024. ÌÇÐÄÆƽâ°æ. Accessed July 31, 2026. /statistics/1451404/us-percentage-change-in-gestational-age-by-age-of-mother/
CDC, NCHS. (2024). Percentage change in gestational age for singleton births in the United States between 2014 and 2022, by age of mother. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: July 31, 2026. /statistics/1451404/us-percentage-change-in-gestational-age-by-age-of-mother/
CDC, and NCHS. "Percentage Change in Gestational Age for Singleton Births in The United States between 2014 and 2022, by Age of Mother." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 30 Jan 2024, /statistics/1451404/us-percentage-change-in-gestational-age-by-age-of-mother/
CDC & NCHS, Percentage change in gestational age for singleton births in the United States between 2014 and 2022, by age of mother ÌÇÐÄÆƽâ°æ, /statistics/1451404/us-percentage-change-in-gestational-age-by-age-of-mother/ (last visited July 31, 2026)
Percentage change in gestational age for singleton births in the United States between 2014 and 2022, by age of mother [Graph], CDC, & NCHS, January 30, 2024. [Online]. Available: /statistics/1451404/us-percentage-change-in-gestational-age-by-age-of-mother/
