Seasonal variation in the birth of left-handed schoolgirls

Arch Neurol. 1979 Feb;36(2):115-6. doi: 10.1001/archneur.1979.00500380085016.


The birth of left-handed girls in a school population displayed a seasonal trend, with a peak in November. No seasonal trend was seen in the birth of left-handed boys. The seasonal pattern of birth of left-handed girls is compatible with the hypothesis that nongenetic factors contribute to the occurrence of left-handedness.

Publication types

  • Research Support, U.S. Gov't, P.H.S.

MeSH terms

  • Child
  • Female
  • Follow-Up Studies
  • Functional Laterality*
  • Humans
  • Male
  • Seasons*
  • Sex Factors
  • Temperature