BDNF and Anxiety: Recent data suggest that this may partly be a result of a gene/environment interplay, including the interaction between prenatal maternal anxiety and the child with respect to the genes for brain‐derived neurotrophic factor (BDNF) 8 and catechol‐O‐methyltransferase (COMT) (O'Donnell and Glover, unpublished data), during the development of emotional and cognitive outcomes, respectively.