Accuracy of second trimester ultrasound dating


Ultrasound Accuracy in Second Trimester



Accuracy of ultrasound dating formulae in the late second-trimester in pregnancies conceived with in-vitro fertilization.

The NCBI web site requires JavaScript to function. To investigate the accuracy of ultrasound dating formulae in the late second trimester of pregnancy. A dataset of singleton pregnancies conceived by artificial reproductive techniques was studied to assess the accuracy of ultrasound dating formulae in the late second trimester, and compared cacuracy early second trimester. A total of 21 published ultrasound-dating formulae were tested. For most formulae, late second trimester scans yielded results that were marginally less accurate than the early second trimester.

The best performance was obtained with dating formulae based on femur length, either alone or combined with the biparietal diameter. These formulae had mean absolute errors of Combining two or more parameters did ultraeound result in any substantial gain in accuracy. Pregnancy dating by ultrasound in the late second trimester is sufficiently accurate for routine clinical use.

Formulae based on femur length appear to be at datig as accurate as head measurements. National Center for Biotechnology InformationU. National Library of Medicine Rockville PikeBethesda MDUSA. Homology BLAST Basic Local Alignment Search Tool BLAST Stand-alone BLAST Link BLink Conserved Domain Accurxcy CDD Conserved Domain Search Service CD Search Genome ProtMap HomoloGene Protein Clusters All Homology Resources Proteins BioSystems BLAST Basic Local Alignment Accurwcy Tool BLAST Stand-alone BLAST Link BLink Conserved Domain Database CDD Conserved Domain Search Service CD Search E-Utilities ProSplign Protein Clusters Protein Database Reference Sequence RefSeq All Proteins Resources Sequence Analysis BLAST Basic Local Alignment Search Tool BLAST Stand-alone BLAST Link BLink Conserved Domain Search Service CD Search Genome ProtMap Genome Workbench Influenza Virus Primer-BLAST ProSplign Splign All Sequence Analysis Resources Taxonomy Taxonomy Taxonomy Browser Taxonomy Common Tree Trimsster Taxonomy Resources Variation Database of Genomic Structural Variation dbVar Database of Genotypes and Phenotypes dbGaP Database of Single Nucleotide Polymorphisms dbSNP SNP Submission Tool All Variation Resources PubMed US National Library of Medicine National Institutes of Health.

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Add to My Bibliography. Generate a file for use with external citation management software. See comment in PubMed Commons below Acta Radiol. Mongelli M 1Yuxin NGBiswas AChew S. Author information 1 Department rtimester Obstetrics and Gynecology, National University Hospital, Singapore, Republic of Singapore. LinkOut - more resources Full Text Sources Ovid Technologies, Inc. PubMed Commons home PubMed Commons.

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How accurate is a due date that is determined by ultrasound?


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