Document Detail

Frequency of twin births in developed countries.
MedLine Citation:
PMID:  16611495     Owner:  NLM     Status:  MEDLINE    
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 maternity since, comparatively to younger mothers, older women more frequently have twins. Moreover, the growing frequency of multiple births also depends on fertility treatments, which are largely used in the developed countries. National data from the civil birth registration systems are taken into account in order to describe, in a comparative study, the main trends of twinning rates in the 20th century.
Gilles Pison; Agata V D'Addato
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Publication Detail:
Type:  Comparative Study; Historical Article; Journal Article    
Journal Detail:
Title:  Twin research and human genetics : the official journal of the International Society for Twin Studies     Volume:  9     ISSN:  1832-4274     ISO Abbreviation:  -     Publication Date:  2006 Apr 
Date Detail:
Created Date:  2006-04-13     Completed Date:  2006-08-18     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  101244624     Medline TA:  Twin Res Hum Genet     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  250-9     Citation Subset:  IM    
Institut National d'Etudes Démographiques, Paris, France.
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MeSH Terms
Birth Rate*
Developed Countries / history,  statistics & numerical data*
History, 19th Century
History, 20th Century

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