Before revision: Long-term impacts on obstetrics While twilight sleep began to wane in popularity after 1915, it permanently altered obstetric care for upper class white women and created irrevocable changes in the role of obstetricians in the United States.
After revision: Long-term impacts on obstetrics While twilight sleep began to wane in popularity after 1915, it permanently altered obstetric care and created irrevocable changes in the role of obstetricians in the United States.