• 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.
Leviton A, Kilty T. Seasonal Variation in the Birth of Left-handed Schoolgirls. Arch Neurol. 1979;36(2):115–116. doi:10.1001/archneur.1979.00500380085016
Coronavirus Resource Center
Customize your JAMA Network experience by selecting one or more topics from the list below.
Create a personal account or sign in to: