ALDH2 and Global developmental delay: Analysis by ALDH2 gene polymorphism revealed that alcohol consumption by mothers carrying the wild‐type ALDH2 (*1/*1) increased the risk of delayed communication skills at 3 years of age, whereas alcohol consumption by mothers carrying a heterozygotic genotype of ALDH2 (*1/*2) enhanced the risk of developmental delay in all five domains of the J‐ASQ‐3.