Population estimates based on bridged race categories released by the National Center for Health Statistics. Retrieved February 15, 2023, from www.marchofdimes.org/peristats. In the United States in 2020, 15.9% of women ages 15-44 were ages 15-19, 34.0% were ages 20-29, 34.3% were ages 30-39, and 15.8% were ages 40-44.