Document Detail

Assessment of cervical length and the relationship between short cervix and preterm birth.
MedLine Citation:
PMID:  22776243     Owner:  NLM     Status:  In-Data-Review    
Premature effacement of the cervix, or short cervix, in the midtrimester of pregnancy currently represents the strongest predictor of spontaneous preterm birth. Numerous studies have examined the relationship between short cervix and preterm birth, and although differences in sensitivity and predictive value exist, the overwhelming consensus indicates that the risk of preterm birth increases with decreasing cervical length. Cutoff values for cervical length range from less than 25 mm to less than 15 mm depending on patient characteristics and gestational age. Importantly, short cervix is more sensitive for predicting earlier forms of prematurity (at <32 weeks) than later forms of prematurity (>32 weeks). Cervical length measured at 18 to 24 weeks' gestation appears to be the most valuable measurement. Cervical length assessments can be performed by digital examination, a cervical measurement device, transabdominal ultrasound, or transvaginal ultrasound. Transvaginal ultrasound is the most reliable method to evaluate cervical length, but it is not available in all locations. Current clinical practice standards do not recommend universal screening for cervical length; however, results of randomized controlled clinical trials provide evidence to support expanded screening programs by individual practitioners.
Joan Slager; Sandra Lynne
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of midwifery & women's health     Volume:  57 Suppl 1     ISSN:  1542-2011     ISO Abbreviation:  J Midwifery Womens Health     Publication Date:  2012 Jul 
Date Detail:
Created Date:  2012-07-10     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100909407     Medline TA:  J Midwifery Womens Health     Country:  United States    
Other Details:
Languages:  eng     Pagination:  4-11     Citation Subset:  IM; N    
Copyright Information:
© 2012 by the American College of Nurse-Midwives.
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