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Über die geographische Verteilung von Zwillingsgeburten in Japan und in Deutschland

Published online by Cambridge University Press:  01 August 2014

S. Ihda
S. Ihda*
Affiliation:
Institut für Humangenetik der Universität Münster i. Westf., (Deutschland)

Summary

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The frequency of twin births in Japan was calculated with the aid of the births statistics of the Japanese government for 1955-1961, and compared with the corresponding data in Western Germany. The results are follows:

1. The frequency of twin births in Japan is 0.64% of all births, while in Germany it is of 1.15%. The ratio of MZ to DZ twins is 63%: 37% in Japan and 32%: 68% in Germany.

2. The present results are mainly in agreement with two previous reports by Komai (1936) and Inouye (1956).

3. The frequency of MZ twin births in Japan is almost the same as in Germany, while the frequency of DZ twin births in Germany is about three times higher than in Japan. This study confirms the hypothesis that the difference of the frequency of twin births between Japan and Germany is only due to the difference of the frequency of DZ twin births.

Type
Research Article
Information
Acta geneticae medicae et gemellologiae: twin research , Volume 14 , Issue 4 , October 1965 , pp. 406 - 416
Copyright
Copyright © The International Society for Twin Studies 1965

References

Literatur

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