doi: 10.1136/jech.29.1.22.
Seasonal variation in anencephalus in Canada
- PMID: 1137766
- PMCID: PMC478882
- DOI: 10.1136/jech.29.1.22
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Seasonal variation in anencephalus in Canada
Br J Prev Soc Med.
1975 Mar.
Abstract
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.
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