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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 demographic shifts is essential for public health planning and resource allocation.

    Purpose of the Study:

    • To present comprehensive 2011 data on U.S. births and associated maternal and infant characteristics.
    • To analyze trends in fertility patterns, birth rates, and key maternal and infant health indicators.

    Main Methods:

    • Descriptive tabulations of 3.95 million births in 2011 using birth certificate data.
    • Population-based rates calculated using U.S. 2010 census postcensal estimates and survey data.

    Main Results:

    • Total births and general fertility rate declined in 2011; teen birth rates fell significantly.
    • Birth rates declined for younger women but rose for women aged 35-44.
    • Preterm birth and low birthweight rates decreased, while cesarean delivery and multiple birth rates remained stable.

    Conclusions:

    • The U.S. experienced a continued decline in births and fertility rates in 2011.
    • Shifting maternal age trends indicate a rise in births among older women.
    • Improvements in infant health indicators suggest positive public health outcomes.