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First trimester 3D ultrasound placental volume for predicting preeclampsia and/or intrauterine growth restriction.
Journal of Obstetrics and Gynaecology : the Journal of the Institute of Obstetrics and Gynaecology 2019 May
The objective of the study was to determine the sensitivity of the placental volume for predicting preeclampsia and/or intrauterine growth restriction (IUGR) in the first trimester. A prospective observational study was conducted in pregnant women with a gestational age of 11 to 13+6 weeks. A 3 D transabdominal placental volume measurement was performed at the time of first-trimester aneuploidy screening. The predictive values of this test were calculated. The data from 360 pregnant women was analysed. Seventeen cases developed preeclampsia and/or IUGR. The 10th percentile of placental volume was used as the cut-off level. The sensitivity, specificity, positive predictive value and negative predictive value of placental volume less than the 10th percentile for prediction of preeclampsia and/or IUGR were 23.5%, 90.7%, 11.1% and 96%, respectively. The sensitivity, specificity, positive predictive value and negative predictive value for prediction of early onset preeclampsia were 50%, 90.7%, 3.0% and 99.7%, respectively. This study demonstrated that the placental volume was lower in the cases with preeclampsia and/or IUGR. It was not an effective screening tool for preeclampsia and/or IUGR in the first trimester. IMPACT STATEMENT What is already known on this subject? Placental volume may reflect trophoblast invasion, but much earlier, in the first trimester. The estimation of a smaller early placental volume has been shown to be significantly associated with preeclampsia and IUGR. What do the results of this study add? The placental volume was lower in the cases with preeclampsia and/or IUGR. It was not an effective screening tool for preeclampsia and/or IUGR in the first trimester. But it might be used for predicting early onset preeclampsia. What are the implications of these findings for clinical practice and/or further research? Further research of placental volume in the first trimester for predicting an early onset preeclampsia should be conducted.
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