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Abstract
Objectives. We compared second pregnancy outcomes among women with and without preeclampsia in their first pregnancies who all had second pregnancies without preeclampsia. Methods. One hundred thirty women with and 6148 without preeclampsia in their first pregnancies, who all had nonpreeclamptic second pregnancies, were included. Outcomes, including delivery gestational age, birthweight, small-for-gestational-age (SGA), and preterm delivery were compared. Results. Overall, second pregnancy outcomes were not different between women with and without preeclampsia in their first pregnancy. However, when women were stratified by gestational timing of preeclampsia, women with preeclampsia at < 34 weeks (N = 22) had smaller infants and delivered earlier in their second nonpreeclamptic pregnancy compared to women with later preeclampsia (N = 108) or no preeclampsia in the first pregnancy. Women with early preeclampsia also had an increased risk of prematurity (< 37 weeks) in second pregnancies that persisted after controlling for confounding factors [Odds ratio (OR = 3.2)]. Discussion. Second, nonpreeclamptic pregnancy outcomes are different between women with previous early preeclampsia and controls but not between late preeclampsia and controls. These findings support other epidemiological data indicating differences between early and late onset preeclampsia as well as a potential relationship of preeclampsia and spontaneous preterm birth.