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This report presents final statistics on births registered in the United States in 2021. It examines fertility patterns and maternal and infant characteristics, using birth-certificate data to describe both the annual results and selected changes over time.
The detailed tables cover maternal age, birth order, prenatal care, smoking, delivery method, sources of payment, gestational age, birthweight and multiple births. State-level measures, explanatory notes and methodological discussion help readers understand how the figures were produced and compared. The complete 2023 publication retains all charts, detailed tables, references and technical notes; 2021 is the data year.