Association of body mass index and maternal age with first stage duration of labour.

Sci Rep · 2021 · PMC8257589 · PMID 34226624

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an increasing trendno p-value reported

Our results confirm seminal research on obese women, showing an increasing trend of augmentation with oxytocin and a correlation with increased duration of both first stage and total duration of active labour 22 , 42 , 43 .

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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.