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Laterality and reproductive indices.

Leonid Kalichman1, Eugene Kobyliansky

  • 1Department of Physical Therapy, Sackler Faculty of Medicine, Stanley Steyer School of Health Professions, Tel Aviv University, Tel Aviv, Israel. anatom14@post.tau.ac.il

Menopause (New York, N.Y.)
|June 14, 2008
PubMed
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This study found no link between manual dominance and reproductive timing. Laterality indices like handedness did not affect age at menarche or menopause in Chuvashian women.

Area of Science:

  • Reproductive endocrinology
  • Human laterality
  • Anthropology

Background:

  • Previous research suggests a link between manual dominance and reproductive milestones.
  • Understanding this association is crucial for reproductive health studies.

Purpose of the Study:

  • To investigate the relationship between multiple indices of laterality and reproductive timing.
  • To determine if handedness, dominant eye, hand clasping, or arm folding influence age at menarche or menopause.

Main Methods:

  • A cross-sectional study of 650 Chuvashian women (aged 18-80).
  • Statistical analysis (independent-sample t test) compared reproductive ages based on dominance in four laterality indicators.
  • Evaluated handedness, dominant eye, hand clasping, and arm folding.

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Main Results:

  • No statistically significant differences were observed in age at menarche or menopause.
  • This applied to all comparisons between right and left dominance across the four laterality indices.
  • The study did not find evidence supporting an association.

Conclusions:

  • This is the first study to examine all four laterality indices simultaneously with reproductive timing.
  • The findings do not support the hypothesis that laterality influences age at menarche or menopause.
  • Further research may explore other potential factors influencing these reproductive events.