Journal
PRENATAL DIAGNOSIS
Volume 33, Issue 13, Pages 1260-1263Publisher
WILEY-BLACKWELL
DOI: 10.1002/pd.4243
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- PerkinElmer
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BackgroundAn understanding of the normal behavior of biochemical markers in twin pregnancies is necessary in order to offer prenatal screening to this subgroup. This study investigates the levels of first trimester maternal serum placental growth factor (PlGF) in twin and singleton pregnancies. MethodsThe PlGF concentrations were measured by an automated assay in the first trimester maternal serum of 440 dichorionic twin, 116 monochorionic twin, and 607 singleton pregnancy samples thawed from frozen storage. ResultsThe PlGF concentrations in singleton levels were predicted by gestational age, maternal ethnicity, and smoking status. Following the correction for these variables, PlGF levels were, on average, 41% higher in dichorionics, but only 16% higher in monochorionics, compared to singleton pregnancies. ConclusionsFirst trimester maternal serum PlGF levels are increased in twin pregnancies compared with singleton pregnancies, but to less of an extent than is common with other screening markers, especially in monochorionic twins. (c) 2013 John Wiley & Sons, Ltd.
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