A polygenic score for age‐at‐first‐birth predicts disinhibition

Background A recent genome‐wide association study identified molecular‐genetic associations with age‐at‐first‐birth. However, the meaning of these genetic discoveries is unclear. Drawing on evidence linking early pregnancy with disinhibitory behavior, we tested the hypothesis that genetic discoveries for age‐at‐first‐birth predict disinhibition. Methods We included participants with genotype data from the two‐decade‐long Environmental Risk...