Human twinning rate in Iniö in the south-west of Finland.
A secular demographic study on the Iniö Island in SW Finland shows an even stronger decline of twinning rates than in the Aland Islands and the rest of the archipelago. Twinning rates in Iniö declined, in fact from about 30%, to less than 10%.
Kroneld
R
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Department of Public Health, University of Turku, Finland.
D005260:Female; D005387:Finland; D049671:History, 18th Century; D049672:History, 19th Century; D049673:History, 20th Century; D006801:Humans; D007223:Infant; D007226:Infant Mortality / Q000639:trends; D008297:Male; D008423:Maternal Age; D012737:Sex Factors; D014427:Twins