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The purpose of establishing the Mothers and Newborns (MN) Cohort under the auspices of the Columbia Center for Children’s Environmental Health (CCCEH) was to create a longitudinal birth cohort study that would further the understanding of prenatal and early-life environmental exposures on children’s health outcomes. We specifically wanted to look at these associations in minority populations who are under-represented in research. 1 With this data collection, we intended to further the science of exposure to environmental toxicants on health outcomes including neurodevelopment, asthma and obesity, as well as to inform policy makers of these associations and opportunities to intervene.

Women in the MN cohort were recruited from March 1998 through to August 2006 at prenatal ambulatory care clinics of New York Presbyterian Medical Center or Harlem Hospital. These clinics provided care for women who …