Twinning and anencephalus occurrence in relation to fetus-fetus interaction.
نویسنده
چکیده
The hypothesis proposed by Knox (1970) that an anencephalic fetus arises from a fetus-fetus interaction between two dizygous twins predicts that the twinning rate, the population incidence of anencephalus, and the female proportion of anencephalics in a population should be positively interrelated. These associations were tested using Canadian data during a long period of time and over a large geographical area. The results did not support the hypothesis.
منابع مشابه
Twins and neural tube defects.
The hypothesis that anencephalus stems from fetus-fetus interactions in dizygotic twin pairs is examined by comparing the epidemiological predictions of the hypothesis with available observations. The hypothesis itself was based upon the disease-discordance and sex-concordance characteristics of twin pairs affected with anencephalus, and upon the sex ratio of the disease itself. The testable pr...
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ورودعنوان ژورنال:
- British journal of preventive & social medicine
دوره 30 1 شماره
صفحات -
تاریخ انتشار 1976