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The role of vitamin D in pre-eclampsia: a systematic review #MMPMID28709403
Purswani JM; Gala P; Dwarkanath P; Larkin HM; Kurpad A; Mehta S
BMC Pregnancy Childbirth 2017[]; 17 (ä): ä PMID28709403show ga
Background: The etiology of pre-eclampsia (PE) is not yet fully understood, though current literature indicates an upregulation of inflammatory mediators produced by the placenta as a potential causal mechanism. Vitamin D is known to have anti-inflammatory properties and there is evidence of an inverse relationship between dietary calcium intake and the incidence of PE. Evidence of the role of vitamin D status and supplementation in the etiology and prevention of PE is reviewed in this article along with identification of research gaps to inform future studies. Methods: We conducted a structured literature search using MEDLINE electronic databases to identify published studies until February 2015. These sources were retrieved, collected, indexed, and assessed for availability of pregnancy-related data on PE and vitamin D. Results: Several case-control studies and cross-sectional studies have shown an association between vitamin D status and PE, although evidence has been inconsistent. Clinical trials to date have been unable to show an independent effect of vitamin D supplementation in preventing PE. Conclusions: The included clinical trials do not show an independent effect of vitamin D supplementation in preventing PE; however, issues with dose, timing, and duration of supplementation have not been completely addressed. Electronic supplementary material: The online version of this article (doi:10.1186/s12884-017-1408-3) contains supplementary material, which is available to authorized users.