Document Detail

Placental weight, digitally derived placental dimensions at term and their relationship to birth weight.
MedLine Citation:
PMID:  20196636     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: A few recent studies have investigated the relationship between birth weight and digitally derived placental dimensions, and no standardised methodology has been used. The aims of this study are to compare manually derived placental measurements with those derived digitally and to establish the relationship of birth weight to the placental weight and circumference.
METHODS: Three hundred fifty-one consecutive unselected women with singleton pregnancy delivering in a tertiary maternity unit at 37-42 weeks were recruited. Manual and digital placental axis measurements (using calibrated digital imaging and 'Image J' software) were obtained and the circumference derived. The relationship between the two methods was assessed using a Bland-Altman plot analysed. The relationship between z-scores of birth weight, placental weight and placental circumference was investigated.
RESULTS: Manually and digitally obtained placental long axis, short axis and circumference measurements show close correlation (r=0.70, 0.70 and 0.83, respectively). The z score of birth weight is significantly correlated with the z score of placental weight (r=0.59, p<0.001) and z score placental digital circumference (r=0.40, p<0.001). Birth weight:placental weight ratio is 7.20 and birth weight:placental circumference=64.57 g/cm.
CONCLUSION: There is close though not perfect agreement between the manual and digital placental measurements. Birth weight is strongly correlated with placental weight and circumference at term.
Sangeeta Pathak; Flora Jessop; Liz Hook; Neil J Sebire; Christoph C Lees
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The journal of maternal-fetal & neonatal medicine : the official journal of the European Association of Perinatal Medicine, the Federation of Asia and Oceania Perinatal Societies, the International Society of Perinatal Obstetricians     Volume:  23     ISSN:  1476-4954     ISO Abbreviation:  J. Matern. Fetal. Neonatal. Med.     Publication Date:  2010 Oct 
Date Detail:
Created Date:  2010-09-13     Completed Date:  2011-01-06     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101136916     Medline TA:  J Matern Fetal Neonatal Med     Country:  England    
Other Details:
Languages:  eng     Pagination:  1176-82     Citation Subset:  IM    
Division of Fetal Medicine, Addenbrookes Hospital, Cambridge University Hospitals NHS Foundation Trust, Cambridge, CB2 2QQ, UK.
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MeSH Terms
Birth Weight*
Image Processing, Computer-Assisted*
Infant, Newborn
Placenta / anatomy & histology*,  ultrasonography*
Prospective Studies

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

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