SynthesisBMC pediatrics2026
Association between maternal exposure to mercury during pregnancy and birth weight: a systematic review and meta-analysis.
Synthesis in BMC pediatrics, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Authors and funding
6 authors.
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Abstract
backgroundEpidemiological research has suggested that exposure to mercury in pregnancy may negatively affect birth weight (BW). However, the results were inconclusive. This meta-analysis aimed to provide a quantitative summary of evidence for the relation of prenatal mercury exposure to BW.
methodsWe performed a systematic search in the PubMed and Scopus databases until March 2024. The pooled effects of prenatal mercury exposure on birth weight (BW) were assessed using a random-effects model, using the standardized regression coefficients (β) along with their corresponding 95% confidence intervals (CI). Stratified analysis by type of specimen, sample size, method of mercury assessment, Hg concentration, and trimester of sampling was conducted to investigate possible sources of heterogeneity.
resultsForty-one studies, including 128,487 participants, were analyzed. In the overall analysis, no significant relationship was revealed between prenatal mercury exposure and BW (β= -0.002, 95%CI: -0.003 to 0.0001; P = 0.06) with substantial heterogeneity (I
conclusionThis meta-analysis revealed that mercury exposure may be negatively associated with birth weight, especially when higher concentrations are present in the blood and placenta, as well as during the late stages of pregnancy, which significantly correlates with lower neonatal BW.
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