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Obesity Is Strongly Associated With Low Testosterone and Reduced Penis Growth During Development.

Mario Mancini1, Francesca Pecori Giraldi2, Alice Andreassi1

  • 1Pediatric and Adolescent Andrological Unit, Department of Pediatrics, San Paolo Hospital, ASST Santi Paolo e Carlo, Università degli Studi di Milano, Milan 20142, Italy.

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Summary

Childhood obesity is linked to reduced penis growth and lower testosterone levels in boys during puberty. This study highlights obesity

Keywords:
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Area of Science:

  • Pediatric Endocrinology
  • Sexual Development Research
  • Obesity and Health Studies

Background:

  • Penile length is a key indicator of male sexual development, yet changes during puberty are not well understood.
  • Limited research exists on the impact of obesity on penile growth and testosterone levels in children and adolescents.

Purpose of the Study:

  • To investigate the relationship between obesity, penile growth, and testosterone levels in boys.
  • To evaluate the influence of obesity on genital development during childhood and adolescence.
  • To introduce and validate a novel, standardized method for measuring penile length in diverse weight groups.

Main Methods:

  • Anthropometric and genital development assessments were conducted on 1130 boys (birth to 20 years).
  • Testosterone levels were measured in participants.
  • A new, non-invasive penile length measurement technique was utilized for accurate comparison between obese and normal-weight boys.

Main Results:

  • A significant correlation was observed between penile length and testosterone levels during puberty.
  • Obese boys exhibited approximately 10% reduced penile length growth compared to normal-weight boys.
  • Reduced testosterone levels were concurrently noted in obese boys across pubertal phases.

Conclusions:

  • Childhood obesity is a significant factor contributing to lower testosterone levels and impaired penile development.
  • The developed measurement method offers improved accuracy for assessing penile length in overweight and obese boys.
  • Further longitudinal studies are necessary to determine the long-term implications for adult genital development and reproductive health.