As part of a series consisting often reports discussing public health achievements in the United States during the twentieth century, the Centers for Disease Control and Prevention (CDC) issued a summary description of the evolution of infant and maternal mortality, and of public health action and social and technological developments shaping that evolution. (The CDC is an agency of the US Department of Health and Human Services.) This document, titled “Achievements in public health, 1900–1999: Healthier mothers and babies,” appeared in the Morbidity and Mortality Weekly Report (a publication of the CDC), 48 (38), I October 1999. It is reproduced below in full. (For two earlier issues in this series, one discussing the effect of vaccines on children's health, and another reviewing the evolution of infectious diseases, see the Documents sections of the June and September 1999 issues of PDR.) The main findings and the contents of the report are succinctly described in the report's opening paragraph.