Significant contributions for the prediction of PE were provided by maternal characteristics and obstetric history, serum PlGF and uterine artery pulsatility index (PI) and with combined screening the detection rates for early PE and late PE were 90% and 49%, respectively, for a false-positive rate of 10%. CONCLUSION: Effective screening for PE can be provided by a combination of maternal characteristics and obstetric history, uterine artery PI and maternal serum PlGF at 11 + 0 to 13 + 6 weeks' gestation...
So bloodwork plus a uterine artery Doppler plus a bunch of information about your history and things like your weight can give them a rough idea to watch you more closely for preeclampsia. It catches most preeclamptics, but not all, and catches some women who won't go on to develop it, but that is a problem with all screening tests.
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