Osterman Michelle J K, Hamilton Brady E, Martin Joyce A, Driscoll Anne K, Valenzuela Claudia P
Natl Vital Stat Rep. 2023 Jan;72(1):1-53.
Objectives-This report presents 2021 data on U.S. births according to a variety of characteristics. Trends in fertility patterns and maternal and infant characteristics are described and interpreted.
目标——本报告展示了2021年美国各类特征的出生数据。描述并解读了生育模式以及母婴特征的趋势。