Abstract
Objectives: The objective of this study was to review data from randomized controlled trials to assess whether or not the supplementation of L-Arginine (L-Arg) is effective in reducing the incidence of preeclampsia (PE) in pregnancies at risk of developing the disorder. Methods: We aimed to systematic review randomized controlled trials, including those which compared L-Arg supplementation with placebo in pregnant women at high risk of PE development, analyzing PE incidence as the main outcome. Data were collected from MEDLINE/ Pubmed, EMBASE/ Elsevier, LILACS/ BVS and Cochrane. Results: A total of 46 papers were identified in the primary search. After analysis of eligibility, inclusion and exclusion criteria, two articles (which respected in detail all the stages of evaluation) were included in the present review. A risk of bias assessment was performed. Data analysis revealed that the incidence of PE was significantly lower in both studies, and no major adverse effects were reported. The limitations of this study were the lack of standardization between the trials analyzed and the relative low number of studies included. Conclusions: The supplementation with L-Arg appears to reduce the incidence of PE in pregnant women with high risk for its development.
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