Frequency of Twin Births in Developed Countries

Twinning rates in developed countries have recently registered an increase. At the end of the 1970s, the change in mother's age structure has partially contributed to the growth in the proportion of multiple births. In fact, the evolution of twinning rates is related to the calendar of maternit...

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Veröffentlicht in:	Twin research and human genetics 2006-04, Vol.9 (2), p.250-259
Hauptverfasser:	Pison, Gilles, d'Addato, Agata V.
Format:	Artikel
Sprache:	eng
Schlagworte:	Demography Humanities and Social Sciences
Online-Zugang:	Volltext
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