Seasonal variation in anencephalus in Canada.
نویسنده
چکیده
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.
منابع مشابه
Seasonal variation in the frequency of anencephalus and spina bifida births in the United Kingdom.
There have been statistically significant seasonal variations of annencephalus and spina bifida in each country of the United Kingdom during 1964-79 with the exception of anencephalus births in Northern Ireland. The seasonal peaks, where discernible, are in phase. Embryos appear to develop anencephalus most commonly in May-June and spina bifida in July.
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عنوان ژورنال:
- British journal of preventive & social medicine
دوره 29 1 شماره
صفحات -
تاریخ انتشار 1975