Hyponatremia complicating labour--rare or unrecognised? A prospective observational study.

BJOG · 2009 · PMC2675008 · PMID 19175600

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highly significantno p-value reported

17 The highly significant correlation of hyponatraemia with prolonged duration of second stage and instrumental delivery could indicate a causal relationship, but the influence of hyponatraemia on uterine contractility has not been studied.

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