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This National Center for Health Statistics report presents final information on U.S. births in 2015. It uses birth-certificate data to describe fertility patterns and changes in maternal and infant characteristics.
The detailed tables cover maternal age, birth order, prenatal care, smoking, delivery method, gestational age, birthweight and multiple births, with selected state comparisons. Technical notes explain definitions and the treatment of the data. The complete January 2017 report retains its original tables, analysis and methodological material.