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Related Experiment Videos

Fetal testosterone and sex differences.

Rebecca Christine Knickmeyer1, Simon Baron-Cohen

  • 1Department of Psychiatry, University of North Carolina-Chapel Hill, CB #7160, 7023 Neurosciences Hospital, Chapel Hill, NC 27599-7160, USA. rebecca_knickmeyer@med.unc.edu

Early Human Development
|November 7, 2006
PubMed
Summary
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Prenatal and neonatal testosterone exposure in males influences brain development, leading to sex differences in neural function and behavior. This hormonal exposure is a key factor in human behavioral dimorphism and social development.

Area of Science:

  • Neuroendocrinology
  • Developmental Neuroscience
  • Behavioral Biology

Background:

  • Androgens, such as testosterone, are crucial for sexual differentiation.
  • Testosterone produced by fetal testes impacts brain development in animal models.
  • Sexual dimorphism in behavior is observed across many species.

Purpose of the Study:

  • To explore the causal role of prenatal and neonatal testosterone exposure in human behavioral sex differences.
  • To argue for testosterone's influence on social development and neural structure.
  • To connect animal findings on androgen action to human behavioral outcomes.

Main Methods:

  • Review of existing animal experimental data.
  • Analysis of hormonal influences on neural development.

Related Experiment Videos

  • Theoretical framework connecting hormonal exposure to behavioral dimorphism.

    • Main Results:

    • Animal studies demonstrate androgens induce sex differences in brain structure and function.
    • Testosterone exposure during critical developmental periods is essential for these changes.
    • These mechanisms are proposed as significant contributors to human behavioral dimorphism.

    Conclusions:

    • Prenatal and neonatal testosterone exposure are strong candidates for causing human behavioral dimorphism.
    • Hormonal influences on the developing brain shape social behavior and neural pathways.
    • Understanding these effects is key to comprehending sex differences in human behavior.