Prenatal Androgen Influence on Addictive Behaviour in Adolescence

Background: Men consume alcohol, tobacco, and illicit drugs more often than women, and they are more prone to pathological gambling and addictive internet gaming. These sex differences are already found during adolescence. The consumption patterns are related to externalizing behavior. In addition to social influences, biological factors play a central role in the development of these differences between men and women. Prenatal exposure to androgens and estrogens shape the brain development with functional and structural effects that persist into adulthood. Intrauterine sex hormone exposure is related to maternal risk factors such as stress and substance use. Aim: In this narrative review, we discuss the potential impact of prenatal androgen exposure in the womb on the development of addictive behaviors and self-regulation in later life. In recent years, this issue has been addressed by animal experiments with direct modulation of prenatal androgenization and clinical association studies based on biomarkers such as the second-to-fourth finger lengths ratio (2D:4D). Results: The available body of literature suggests that reinforced brain androgenization during the intrauterine development increases the risk for addictive behaviors and deficits in self-regulation capacity in later life. Finally, we also discuss prevention strategies during pregnancy targeting this model and refer to the Maternal Health and Infant Development in the Follow-up after Pregnancy and a Mindfulness Intervention study. This investigation is a subproject of the IMAC-Mind research collaborative project to improve mental health and reduce addiction risk in childhood and adolescence through mindfulness.