Seasonal variation in anencephalus in Canada.

  title={Seasonal variation in anencephalus in Canada.},
  author={J Mark Elwood},
  journal={British journal of preventive & social medicine},
  volume={29 1},
  • J Mark Elwood
  • Published 1975 in British journal of preventive & social medicine
A study of the monthly numbers of stillbirths and of deaths due to anencephalus in Canada from 1954 to 1962 showed a weak tendency to a winter excess of affected births. The seasonal trend was more marked in the Prarie provinces and in Quebec than elsewhere; the maximum rate of anencephalus occurrence was in October to December in the Prairies and in British Columbia, and in January to March in other regions.