Document Detail

Sonographic assessment of chorionicity and amnionicity in twin pregnancies: how, when and why?
MedLine Citation:
PMID:  9575276     Owner:  NLM     Status:  MEDLINE    
During the first trimester, chorionicity can be assessed as early as five weeks post-conception, but a reliable detection of amnionicity cannot be performed before the 8th week when the amnion can be clearly imaged. The late second and third trimesters twin pregnancies are a true challenge to the imaging specialist because the detection of chorionicity and amnionicity has to rely upon sonographic clues, such as placenta location, fetal gender, membrane origin, thickness, and layer. Sonographic methods used to determine chorionicity and amnionicity in twins can be extrapolated to any multifetal pregnancy, regardless of the number of fetuses present.
A Monteagudo
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Publication Detail:
Type:  Journal Article; Review    
Journal Detail:
Title:  Croatian medical journal     Volume:  39     ISSN:  0353-9504     ISO Abbreviation:  Croat. Med. J.     Publication Date:  1998 Jun 
Date Detail:
Created Date:  1998-08-12     Completed Date:  1998-08-12     Revised Date:  2005-11-16    
Medline Journal Info:
Nlm Unique ID:  9424324     Medline TA:  Croat Med J     Country:  CROATIA    
Other Details:
Languages:  eng     Pagination:  191-6     Citation Subset:  IM    
Department of Obstetrics & Gynecology, NYU Medical Center, 550 First Avenue Room 9N28, New York, NY 10016, USA.
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MeSH Terms
Amnion / ultrasonography*
Chorion / ultrasonography*
Pregnancy Trimesters
Ultrasonography, Prenatal* / methods

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