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Objectives
The soluble fms‐like tyrosine kinase‐1 (sFlt‐1) to placental growth factor (PlGF) ratio is generally elevated some time before and at the clinical onset of pre‐eclampsia. The PROGNOSIS study validated a sFlt‐1/PlGF ratio cut‐off of ≤ 38 to rule out the onset of pre‐eclampsia within 1 week of testing in women with suspected disease. The aim of this study was to assess the predictive value...