Child Development and Behavior Branch Contraceptive Discovery and Development Branch Developmental Biology and Structural Variation Branch Fertility and Infertility Branch Gynecologic Health and Disease Branch Intellectual and Developmental Disabilities Branch Maternal and Pediatric Infectious Disease Branch Obstetric and Pediatric Pharmacology and Therapeutics Branch Pediatric Growth and Nutrition Branch Pediatric Trauma and Critical Illness Branch Population Dynamics Branch Pregnancy and Perinatology Branch National Center for Medical Rehabilitation Research Division of Intramural Population Health Research Biostatistics and Bioinformatics Branch Epidemiology Branch Health Behavior Branch Division of Intramural Research Office of the Scientific Director Scientific Affinity Groups Aquatic Models of Human Development Basic Mechanisms of Genome Regulation Behavioral Determinants and Developmental Imaging Bone and Matrix Biology in Development and Disease Cell and Structural Biology Cell Regulation and Development Developmental Endocrine Oncology and Genetics Genetics and Epigenetics of Development Integrative Membrane, Cell, and Tissue Pathophysiology Metals Biology and Molecular Medicine Neurosciences Pediatric Endocrinology, Metabolism, and Molecular Genetics Perinatal and Obstetrical Research Reproductive Endocrine and Gynecology National Children's Study The National Children's Study (NCS) was a longitudinal cohort study that planned to recruit participants from across the United States of America. The NCS was led by the National Institutes of Health, with the NICHD serving as the scientific lead. It was intended to measure the many factors that contribute to health and disease from before birth through age 21. This included, but was not limited to, the search for drivers of diseases with prenatal or developmental origins. The Study was closed in December 2014. Organization Within NICHD, the NCS Program Office administered the implementation of day-to-day Study operations. The Program Office was supervised by the Study Director, Steven Hirschfeld, MD, PhD Associate Director for Clinical Research, NICHD. For advice and recommendations regarding Study framework, content, and methodologies, the NCS Program Office engaged external advisors and scientific groups. These groups included federal partners such as the NCS Federal Advisory Committee and a Federal Consortium with representatives from multiple federal agencies including: the U.S. Department of Health and Human Services, the National Institute of Environmental Health Sciences of the National Institutes of Health, the Centers for Disease Control and Prevention, and the U.S. Environmental Protection Agency. An independent Study Monitoring and Oversight Committee monitored study progress and participant safety. In addition to these more formal channels, the NCS solicited feedback from subject matter experts from around the world and from individuals, community advocates, and professional societies concerned