Gene-Environment Interactions in Birth Defects and Developmental Disorders, Volume 152, covers the multifactorial etiology of a variety of developmental disorders, including orofacial clefts, fetal alcohol spectrum disorders, autism, and others. The causes of individual cases of most common birth defects are unknown but likely involve a combination of genetic predisposition and environmental exposures. How these risk factors interact in the genesis of these conditions is still largely unknown and readers will find the latest information and ideas on these disorders, along with discussion of the challenges and opportunities for furthering knowledge in this area.