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Knowing the timing of preeclampsia diagnosis can inform our understanding of associated fetal mortality. In a population-based cohort study of >550,000 singleton births in Norway from 1999 through 2008, investigators estimated preterm risk for fetal death during 21,000 pregnancies with preeclampsia (3.8%) and quantified this risk at each gestational week. Data from the Medical Birth Registry of Norway were supplemented with detailed prenatal records from a subset of 1857 preeclamptic pregnancies with known week of diagnosis.
Risk for stillbirth was 3.6 per 1000 in all pregnancies and 5.2 per 1000 in pregnancies with preeclampsia. In pregnancies without preeclampsia, weekly risk for fetal death from 25 to 40 weeks was 0.1 to 0.9 per 1000. How…