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Year : 2000  |  Volume : 5  |  Issue : 2  |  Page : 59-61

Symphysis-fundal height measurements in predicting fetal macrosomia

Department of Obstetrics and Gynaecology, University of Nigeria Teaching Hospital, Enugu -, Nigeria

Correspondence Address:
H E Onah
Dept. of Obstetrics and Gynaecology, U.N.T.H, Enugu
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Source of Support: None, Conflict of Interest: None

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The predictive value of symphysio-funtfai height(SFH) measurements in fetal macrosomia was evaluated in a prospective cross-sectional study of 378 consecutive parturients at the University of Nigeria Teaching Hospital, Enugu, Eastern Nigeria over a three and half months period. Different cutoff levels of SFH were tested for ability to predict macrosomia (defined as a birthweight ≥4000g) by calculating the sensitivity, specificity, false-positive rate etc. The discriminatory power of SFH in predicting fetal macrosomia was determined by constructing a relative operating characteristic(ROC) curve and, testing, the area under the curve for significant difference from the area under the ROC curve for y = x. A cut-off level of SFH ≥ 40cm maximised both the sensitivity and specificity of SFH in predicting macrosomia (X2 168.6, p = 0.0000). The area under the ROC curve for SFH was significantly different from the area under the ROC curve for y = x (p = 0.001). It was concluded that SFH ≥40cm is a good cut-off for predicting fetal macrosomia and is a useful alternative to ultrasonography in our population.

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