From the Centers for Disease Control and Prevention. Healthier mothers and babies--1900-1999.
D005260:Female; D005544:Forecasting; D049673:History, 20th Century; D006801:Humans; D007226:Infant Mortality / Q000639:trends*; D007231:Infant, Newborn; D008428:Maternal Mortality / Q000639:trends*; D011634:Public Health / Q000266:history / Q000639:trends*; D014481:United States