Summary: New research reveals sex-related differences in neurodevelopmental and health outcomes among people exposed to alcohol before birth. Prenatal alcohol exposure was linked to higher risk of depression and anxiety in girls and women, while boys and men showed higher prevalence of ADHD, conduct disorder, and oppositional defiant disorder.
Source: Research Society on Alcoholism
Researchers analyzing a large Canadian clinical database found clear sex differences in the health, neurodevelopment, and life experiences of people with prenatal alcohol exposure (PAE).
Published in Alcohol: Clinical and Experimental Research, the study shows that males experienced more pronounced neurodevelopmental impairments across domains such as motor skills, memory, attention, executive functioning, and adaptive behaviour. Females had higher rates of endocrine disorders and mood and anxiety conditions.
Patterns of adversity also differed by sex. Females reported higher rates of trauma and victimization, while males were more likely to face school challenges and involvement with the criminal justice system. These divergent outcomes suggest the need for sex- and gender-informed approaches to screening, diagnosis, and support for people with FASD (fetal alcohol spectrum disorder).
The researchers reviewed 2,574 clinical records from Canada’s National FASD Database, collected across 29 diagnostic centres. Participants ranged from 1 to 61 years old (mean age 15.2 years); 58.3 percent were male at birth. Male and female participants were equally likely to receive an FASD diagnosis, but their profiles of impairments, co-occurring conditions, and life experiences differed in important ways.
Compared with females, males in the sample showed higher rates of neurodevelopmental impairment, which may contribute to more frequent diagnoses of attention-deficit/hyperactivity disorder (ADHD), conduct disorder, and oppositional defiant disorder. Females in the study were more likely to be diagnosed with anxiety and depressive or mood disorders. Although similar sex patterns exist in the general population, the overall prevalence of these conditions was substantially greater among people with prenatal alcohol exposure.
The study highlights the lifetime adversity experienced by people with PAE. For example, roughly 30 percent of female participants and 20 percent of male participants reported experiences of physical and/or sexual abuse. School disciplinary actions were more common among males: 18 percent of male students were expelled or suspended compared with 9 percent of female students. Males also showed higher rates of offending and incarceration.
Authors suggest that difficulties with adaptive functioning, executive skills, and disruptive behaviours could contribute to problems in school and contact with the justice system among males. The researchers also note that differences between sexes were most evident during adolescence (13–17 years) and adulthood (25 years and older). Among preschool-aged children, clinical presentation and experiences were similar across sexes, pointing to the potential influence of later social, institutional, and gendered responses on long-term outcomes.
These findings underline the importance of tailored interventions: improving supports in educational settings, adapting assessment and treatment to recognize gendered and subtler presentations of FASD, and offering trauma-informed care for people with complex needs. Early, targeted supports could reduce school disruption, prevent legal involvement, and better address mental and physical health needs.
The authors call for further research into how sex and gender interact with family, employment, cultural identity, and interpersonal relationships to shape the lived experiences of people with FASD. A deeper understanding of these factors can inform policy, service design, and advocacy to improve outcomes across the lifespan.
Fetal alcohol spectrum disorder is a neurodevelopmental disability caused by alcohol exposure in utero. It is estimated to affect approximately four to five percent of the population, making it a significant public health concern that requires coordinated clinical, educational, and social supports.
About this psychology and neurodevelopment research news
Author: Jocelynn Cook
Source: Research Society on Alcoholism
Contact: Jocelynn Cook – Research Society on Alcoholism
Image: The image is in the public domain
Original Research: Closed access. “Sex-related differences among individuals assessed for fetal alcohol spectrum disorder in Canada” by K. Flannigan et al., Alcohol: Clinical and Experimental Research.
Abstract
Sex-related differences among individuals assessed for fetal alcohol spectrum disorder in Canada
Background
Sex and gender are important factors in understanding health and wellbeing, yet relatively little research has examined how they shape outcomes for people with fetal alcohol spectrum disorder. FASD is a complex neurodevelopmental condition that affects an estimated 4%–5% of the population. Identifying sex-related differences in clinical presentation and life experiences is essential to inform assessment, treatment planning, and advocacy for people with FASD.
Methods
The study analyzed 2,574 clinical records from 29 FASD diagnostic centres across Canada. Participants ranged from 1 to 61 years old (mean age 15.2 years) and were 58.3 percent male at birth. Variables included demographics, physical indicators of prenatal alcohol exposure, neurodevelopmental impairments, FASD diagnoses, co-occurring physical and mental health conditions, and experiences of environmental adversity.
Results
No significant sex differences were found in overall FASD diagnostic outcomes or in physical indicators of prenatal alcohol exposure. However, males exhibited more neurodevelopmental impairment overall. Females showed higher rates of endocrine problems, anxiety, and depressive disorders, while males had higher rates of ADHD, conduct disorder, and oppositional defiant disorder. Adversity patterns also varied: females reported more trauma and victimization issues, whereas males had more school problems and higher rates of offending and incarceration. The most pronounced sex-based differences appeared in adolescents and adults.
Conclusions
People with prenatal alcohol exposure and FASD experience notable sex-related differences in clinical presentation and life experiences over the lifespan. These findings can guide researchers, service providers, and policymakers to improve screening, diagnosis, and interventions, ensuring better support for individuals with PAE/FASD across genders.