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  1. Introduction This report from the National Center for Health Statistics, “Births: Provisional Data for 2023,” is part of the National Vital Statistics System Rapid Release Quarterly Provisional …

  2. The Born rule provides a link between the mathematical formalism of quantum theory and experiment, and as such is almost single-handedly responsible for practically all predictions of …

  3. This paper traces the early history of the Born rule 100 years ago, its generalization (essential for today’s quantum optics and quantum information theory) to POVMs around 50 years ago, and …

  4. 6 days ago · Fertility, by Mother’s Place of Birth CBO projects different fertility rates for women in the United States who were born in this country and those who were born elsewhere. The …

  5. Objectives—This report presents provisional 2024 data on U.S. births. Births are shown by age and race and Hispanic origin of mother. Data on cesarean delivery and preterm births are also …

  6. This report updates and extends those findings by examining trends from 2016 to 2023, describing changes in the mean age of mothers by birth order (first, second, and third and …

  7. Results—A total of 3,667,758 births occurred in the United States in 2022, essentially unchanged from 2021. The general fertility rate declined 1% from 2021 to 56.0 births per 1,000 females …