Vaginal progesterone for prevention of preterm birth in asymptomatic high-risk women with a normal cervical length: a systematic review and meta-analysis protocol.

Syst Rev · 2021 · PMC8139044 · PMID 34020724

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a worrying trendno p-value reported

This is a worrying trend as PTB remains the leading cause of death for children under the age of five [ 4 ].

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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.