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    In 2015, U.S. births declined slightly, with lower fertility rates and fewer teen births. However, preterm and low birthweight rates saw a small increase, alongside a continued decrease in cesarean deliveries.

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    Area of Science:

    • Demography
    • Public Health
    • Reproductive Health

    Background:

    • U.S. birth data provides critical insights into population trends and maternal/infant health.
    • Understanding fertility patterns is essential for public health planning and resource allocation.

    Purpose of the Study:

    • To present comprehensive 2015 U.S. birth data across various demographic and health characteristics.
    • To analyze trends in fertility, maternal age, birth outcomes, and delivery methods.

    Main Methods:

    • Descriptive tabulation of data from 3.98 million U.S. birth certificates from 2015.
    • Analysis of trends in maternal age, birth order, race/ethnicity, marital status, delivery method, gestation, birthweight, and plurality.

    Main Results:

    • Total U.S. births decreased slightly in 2015, with a 1% decline in the general fertility rate.
    • Teen birth rates (15-19) dropped 8%, while birth rates increased for women in their 30s and early 40s.
    • Preterm birth and low birthweight rates slightly increased, while cesarean delivery rates continued to decline.

    Conclusions:

    • Fertility patterns are shifting, with declining overall rates but increasing birth rates among older women.
    • While cesarean deliveries are decreasing, concerning trends in preterm and low birthweight necessitate continued monitoring.
    • The data underscores the dynamic nature of U.S. fertility and infant health outcomes.