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  • Title: Folic acid supplementation in early second trimester and the risk of preeclampsia.
    Author: Wen SW, Chen XK, Rodger M, White RR, Yang Q, Smith GN, Sigal RJ, Perkins SL, Walker MC.
    Journal: Am J Obstet Gynecol; 2008 Jan; 198(1):45.e1-7. PubMed ID: 18166303.
    Abstract:
    OBJECTIVE: The objective of the study was to evaluate the association between folic acid supplementation in early second trimester and the risk of developing preeclampsia. STUDY DESIGN: We carried out a prospective cohort study between October 2002-December 2005. We recruited women who had their prenatal care visit (12-20 weeks' gestation) at the Ottawa Hospital and Kingston General Hospital. All charts for participants with a diagnosis of preeclampsia were audited and blindly adjudicated by 4 study investigators to validate the diagnosis. RESULTS: A total of 2951 pregnant women were included in the final analysis. Supplementation of multivitamins containing folic acid was associated with increased serum folate (on average 10.51 micromol/L), decreased plasma homocysteine (on average 0.39 micromol/L), and reduced risk of preeclampsia (adjusted odds ratio, 0.37; 95% confidence interval, 0.18-0.75). CONCLUSION: Supplementation of multivitamins containing folic acid in the second trimester is associated with reduced risk of preeclampsia.
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