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Published on: March 2, 2011
Prenatal Testosterone and Preschool Disruptive Behavior Disorders.
Bethan A Roberts1, Michelle M Martel1
1Psychology Department, University of New Orleans, 2000 Lakeshore Drive, New Orleans, Louisiana 70148.
Prenatal testosterone exposure, indicated by finger length ratios, is linked to higher hyperactivity-impulsivity symptoms in preschool girls with Attention-Deficit/Hyperactivity Disorder (ADHD). This association was not found in boys, suggesting a potential sex-specific effect.
Area of Science:
- Developmental Psychology
- Neuroendocrinology
- Child Psychiatry
Background:
- Disruptive Behavior Disorders (DBD), including Oppositional-Defiant Disorder (ODD) and Attention-Deficit/Hyperactivity Disorder (ADHD), are common in early childhood and often present with a male predominance.
- Prenatal exposure to testosterone is hypothesized to influence the development of sex-biased behavioral conditions.
Purpose of the Study:
- To investigate the association between prenatal testosterone exposure and specific Disruptive Behavior Disorder symptom domains in preschool children.
- To explore potential sex differences in the relationship between prenatal testosterone and early-emerging DBDs.
Main Methods:
- The study included 109 preschool children (ages 3-6) and their caregivers.
- Prenatal testosterone exposure was indirectly measured using the 2D:4D digit ratio of the right hand.
- Caregivers and teachers completed standardized questionnaires assessing DBD symptoms, including Attention-Deficit/Hyperactivity Disorder (ADHD).
Main Results:
- A significant association was found between higher prenatal testosterone exposure (smaller right 2D:4D ratio) and increased hyperactive-impulsive ADHD symptoms in girls.
- This association was not significant in boys, indicating a potential sex-specific effect.
Conclusions:
- Prenatal testosterone exposure may be a risk factor for developing hyperactive-impulsive Attention-Deficit/Hyperactivity Disorder symptoms in preschool girls.
- These findings highlight the importance of considering prenatal hormonal influences in the etiology of early childhood disruptive behaviors, particularly in girls.
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