Association of preeclampsia, placental pathology, and maternal-fetal features with gestational hypertension before and after 34 weeks of pregnancy Preeclampsia and Placental pathology
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Abstract
Objective: Evaluating the preeclampsia, placental pathology, maternal and fetal features in women with gestational hypertension (GH) at varying gestational ages.
Methods: A series of maternal, fetal, placental pathological, and neonatal variables were prospectively evaluated and compared between two 30-tuple groups of eligible pregnant women with early GH before 34 weeks' gestation and those with late GH after 34 weeks' gestation.
Results: Proteinuria and preeclampsia were more prevalent in the early GH group compared with the late GH group (80% vs 20%, P:0.001). The maternal high blood pressure and proteinuria were significantly associated with the early GH and preeclampsia (p<0.05). The percentage of syncytial knots significantly increased as preeclampsia progressed (P<0.05). A significant positive correlation existed between the early GH and the percentage of newborns admitted to NICU, the length of hospitalization, and the levels of the doppler indexes of umbilical and uterine arteries (p<0.05); the newborn Apgar scores were also lower in the early GH group (p<0.05). The mortality rate of newborns born to early hypertensive mothers (13.30%) was insignificantly higher than those delivered by the late hypertensive mothers (3.30%, p:0.16).
Conclusion: Maternal high blood pressure and proteinuria may be predicting risk factors for the early GH and/or preeclampsia. The placentas of women with early GH were partially different from those with GH after 34 weeks' gestation. Higher rates of maternal and fetal pregnancy-related complications in the early GH group may be indicative of the different effects of GH and preeclampsia on pregnancy outcomes depending on the gestational age.
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