Brown Andrea D, Hamilton Brady E, Kissin Dmitry M, Martin Joyce A
Natl Vital Stat Rep. 2025 Jun 13;74(9):1-6. doi: 10.15620/cdc/174598.
This report presents recent trends in the mean (average) age of mothers when they gave birth in the United States from 2016 to 2023. It updates previous analyses by examining trends in mean maternal age by birth order and presents trends and differences in mean age at first birth across race and Hispanic origin and urbanicity.
Data are from the National Vital Statistics System, comprising all birth records in the United States for 2016-2023. Mean maternal age was calculated for first, second, and third and higher-order births (the number of live births born to a woman during her lifetime). Trends over time and differences by mother's race and Hispanic origin and urbanicity are described.
The mean age of mothers at first birth increased 0.9 year, from 26.6 in 2016 to 27.5 in 2023. Similar increases were observed for higher-order births, with mean age at birth rising by 1.0 year for second births and 0.9 year for third and higher-order births. All racial and ethnic groups saw an increase in mean age at first birth of 0.4-1.4 years. Mean maternal age at first birth rose across all levels of urbanicity, from large metropolitan counties to rural counties, by 0.7-0.9 year. In 2023, mothers in large metropolitan counties had the highest mean age at first birth (28.5), while those in noncore counties had the lowest (24.8).
本报告呈现了2016年至2023年美国产妇分娩时的平均年龄的近期趋势。通过按出生顺序研究平均产妇年龄趋势，更新了之前的分析，并呈现了不同种族、西班牙裔血统和城市化程度的首次生育平均年龄的趋势及差异。
数据来自国家生命统计系统，包括2016 - 2023年美国所有的出生记录。计算了第一胎、第二胎以及第三胎及以上（一名女性一生中生育的活产婴儿数量）的平均产妇年龄。描述了随时间的趋势以及按母亲种族、西班牙裔血统和城市化程度的差异。
首次生育的母亲平均年龄增加了0.9岁，从2016年的26.6岁增至2023年的27.5岁。较高胎次生育也有类似增长，第二胎的出生平均年龄上升了1.0岁，第三胎及以上的出生平均年龄上升了0.9岁。所有种族和族裔群体的首次生育平均年龄都增加了0.4 - 1.4岁。从大城市县到农村县，所有城市化水平的首次生育平均产妇年龄都有所上升，增幅为0.7 - 0.9岁。2023年，大城市县的母亲首次生育平均年龄最高（28.5岁），而非核心县的母亲首次生育平均年龄最低（24.8岁）。
