Investigation of the association between maternal serum ferritin levels and preterm delivery: A systematic review and meta-analyses.

Arch Gynecol Obstet · 2026 · PMC12872698 · PMID 41639469

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an overall trendno p-value reported

As a result, the pooled effect estimates should be interpreted as summary measures describing an overall trend rather than precise estimates applicable to all populations.

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highly significantno p-value reported

Moreover, this association was highly significant in the second trimester, although there was high heterogeneity, and publication bias was significant.

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.