Warren M. Hern, MD, is a practicing physician in Boulder, Colorado, where he is also on the anthropology faculty at the University of Colorado. He holds a Master of Public Health degree and a PhD in epidemiology. His clinical and epidemiologic research has been published widely in scientific and medical journals, including BioScience and Population Studies. His public advocacy of reproductive rights has appeared in The New York Times, Washington Post, CBS' 60 Minutes, and other prominent venues. He has conducted decades of research in fertility and population trends based in the Peruvian Amazon.