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Births: preliminary data for 2012.

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    Area of Science:

    • Demography
    • Public Health
    • Vital Statistics

    Background:

    • The United States experienced shifts in birth trends over recent years, with notable declines in fertility rates.
    • Understanding demographic changes in births is crucial for public health planning and resource allocation.

    Purpose of the Study:

    • To present preliminary data on births in the United States for the year 2012.
    • To analyze birth statistics by maternal age, live-birth order, race, Hispanic origin, and marital status.
    • To report on trends in cesarean delivery, preterm births, and low birthweight.

    Main Methods:

    • Utilized preliminary birth data representing 99.96% of all 2012 births in the U.S.
    • Employed weighting for states with incomplete data to ensure accurate national estimates.
    • Compared 2012 preliminary data with final 2011 birth statistics.

    Main Results:

    • The total number of births in 2012 was 3,952,937, statistically unchanged from 2011.
    • Fertility rates declined for most demographic groups, reaching historic lows for teenagers (15-19) and women in their early 20s.
    • Birth rates increased for women in their 30s and early 40s, while rates for Asian or Pacific Islander women rose.
    • The preterm birth rate decreased to 11.54% and the low birthweight rate declined to 7.99%.

    Conclusions:

    • While overall U.S. birth numbers remained stable in 2012, significant demographic shifts in fertility occurred.
    • Declining birth rates among younger women and increasing rates among older women highlight evolving reproductive patterns.
    • Improvements in preterm birth and low birthweight rates indicate positive public health outcomes.