Dizytwin: Latitude and dizygotic twinning rates
Description
Age-standardized dizygotic twinning rates correlate positively and significantly with latitude.Format
A data frame with 19 observations on the following two variables.
- Latitude
- Geographical latitude in Europe.
- DZT_Rate
- Dizygotic twinning rates across the countries.
Source
James, W. H. (1985). "Dizygotic twinning, birth weight and latitude". Annals of Human Biology,12, 441--447.Details
In Europe, both mean birth weight and age-standardized dizygotic twinning rates correlate positively and significantly with latitude. It seems possible that these two sorts of correlation have explanations in common via pituitary action.Examples
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