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Objective: To assess the interobserver variability of ultrasound measured fetal nuchal thickness (NT). Study design: NT was measured in 103 consecutive early midtrimester pregnancies (13-18 weeks) by three ultrasonographists with different levels of expertise, in our Prenatal Diagnosis Unit. Measurements were obtained prior to amniocentesis, blindly in relation to other examiners' values. The Lin's...
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