This topic puts forward a hypothesis: genetic and environmental factors such as major depressive disorder during pregnancy, nutritional status of vitamin A, D, E, and folic acid, intestinal microecology, and bisphenol A exposure, may affect the cognitive development level of the offspring through the genetic correlation with attention deficit hyperactivity disorder, developmental delay/intellectual disability, and major depressive disorder, allelic heterogeneity and pleiotropy of ITIH3 mediated by SNP and CACNB2, neurotransmitters like dopamine, and metabolic pathways, thereby increasing the risk of attention deficit hyperactivity disorder and developmental delay/intellectual disability prevalence on offspring. This topic planning from allelic heterogeneity and pleiotropy of attention deficit hyperactivity disorder and major depressive disorder mediated by SNP, neurotransmitters like dopamine, and metabolic pathways, explores deeply the influences on children's development level and the risk of common neurological disorder caused by genetic and environmental factors during pregnancy, looking for reasonable prevention, early diagnosis of biomarkers and therapeutic targets, in order to provide data support for further improvement and revision of national mother and infant healthcare policy .