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Prenatal testosterone and stuttering.

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Keywords:
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Area of Science:

  • Neuroscience
  • Endocrinology
  • Speech-Language Pathology

Background:

  • Stuttering is more prevalent in males than females, suggesting a role for sex hormones.
  • The biological basis for this sex disparity in stuttering remains unclear.

Purpose of the Study:

  • To investigate the association between prenatal testosterone exposure and stuttering.
  • To explore the relationship between the 2D:4D ratio (an indicator of prenatal testosterone) and the severity of stuttering experiences.

Main Methods:

  • Compared 2D:4D ratios in individuals who stutter versus controls.
  • Correlated 2D:4D ratios with stuttering symptom severity using the Overall Assessment of the Speaker's Experience of Stuttering (OASES) in adults who stutter.

Main Results:

  • No significant difference in 2D:4D ratios was found between stuttering and non-stuttering groups.
  • A negative correlation was observed between 2D:4D ratio and OASES scores, indicating lower ratios were associated with greater negative impacts of stuttering.
  • This correlation was more pronounced in females who stutter.

Conclusions:

  • Prenatal testosterone levels, indirectly measured by 2D:4D ratio, may influence the psychosocial impact of stuttering.
  • This study provides novel insights into the potential biological factors contributing to individual differences in stuttering experiences.