Document Detail

Magnetic resonance imaging of the cervix during pregnancy: effect of gestational age and prior vaginal birth.
MedLine Citation:
PMID:  16202756     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To investigate how gestational age and prior vaginal birth affect cervical anatomy on magnetic resonance imaging during pregnancy. STUDY DESIGN: Magnetic resonance images of the cervix were obtained in consecutive patients referred for a suspected fetal abnormality. We used an image processing protocol to measure cervical dimensions, orientation, and signal intensity. We determined how outcome variables were affected by gestational age and prior vaginal birth. RESULTS: Adequate images were obtained in 53 of 57 patients at 17 to 36 weeks. As gestational age increased by 12 weeks, the mean cross-sectional area of the cervical canal and cervical stroma increased 31% (95% confidence interval 0% to 73%) and 31% (95% confidence interval 11% to 55%), respectively. The normalized signal intensity of the stroma increased from 0.83 (95% confidence interval 0.81 to 0.85) at 20 weeks to 0.91 (95% confidence interval 0.88 to 0.94) at 32 weeks. None of the outcome variables were affected by prior vaginal birth. CONCLUSION: Magnetic resonance imaging revealed that cross-sectional area and signal intensity of the cervical stroma increase with increasing gestational age.
Michael House; Mark O'Callaghan; Stephane Bahrami; David Chelmow; Jonathan Kini; Danny Wu; Samuel Patz; Rafeeque A Bhadelia
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  American journal of obstetrics and gynecology     Volume:  193     ISSN:  1097-6868     ISO Abbreviation:  Am. J. Obstet. Gynecol.     Publication Date:  2005 Oct 
Date Detail:
Created Date:  2005-10-05     Completed Date:  2006-01-19     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0370476     Medline TA:  Am J Obstet Gynecol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1554-60     Citation Subset:  AIM; IM    
Division of Maternal-Fetal Medicine, Tufts-New England Medical Center, Boston, MA, USA.
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MeSH Terms
Cervix Uteri / anatomy & histology*
Delivery, Obstetric*
Magnetic Resonance Imaging*
Pregnancy Trimester, Second
Pregnancy Trimester, Third

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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