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The East Flanders Prospective Twin Survey (EFPTS).
MedLine Citation:
PMID:  17254399     Owner:  NLM     Status:  MEDLINE    
The East Flanders Prospective Twin Survey (EFPTS) is a prospective, population-based registry of multiple births in the province of East Flanders, Belgium. EFPTS has several unique features: it is population based and prospective, with the possibility of long-term follow-up; the twins (and higher order multiple births) are ascertained at birth; basic perinatal data recorded; chorion type and zygosity established; and since 1969 placental biopsies have been taken and frozen at -20 degrees C for later determination of genetic markers. The EFPTS is the only large register that includes placental data and allows differentiation of 3 subtypes of monozygotic (MZ) twins based on the time of the initial zygotic division: the dichorionic-diamnionic pairs (early, before the 4th day after fertilization), the monochorionic-diamnionic pairs (intermediate, between the 4th and the 7th day post fertilization), and the monochorionic-monoamnionic pairs (late, after the 8-day post fertilization). This added a new dimension to didymology (the science of twins; didymos is the Greek word for twin): the timing of MZ twinning. Studies can be initiated taking into account primary biases, those originating in utero. Such studies could throw new light on the controversy over the validity of the classic twin method, the consequences of early embryological events (before and just after implantation of the embryo), the origin of congenital malformations, the sex proportion of multiples, the gene-environment interactions as far as intrauterine environment is concerned, to name but a few.
Catherine A Derom; Robert F Vlietinck; Evert W Thiery; Fernand O G Leroy; Jean-Pierre Fryns; Robert M Derom
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Twin Study    
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 Dec 
Date Detail:
Created Date:  2007-01-26     Completed Date:  2007-03-14     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101244624     Medline TA:  Twin Res Hum Genet     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  733-8     Citation Subset:  IM    
Department of Human Genetics, Katholieke Universiteit Leuven, Leuven, Belgium.
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MeSH Terms
Data Collection
Infant, Newborn
Prospective Studies
Twins, Dizygotic
Twins, Monozygotic

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