The studies reviewed have shown in principle that amniotic fluid volume may be increased by maternal hydration. PICOsĪs the studies reviewed have not assessed clinically relevant outcomes or possible complications, there is no evidence to support the use of maternal hydration in routine practice, except in the framework of further clinical trials designed to address these issues.
Controlled trials are needed to assess the clinical benefits and possible risks of maternal hydration for specific clinical purposes. Simple maternal hydration appears to increase amniotic fluid volume and may be beneficial in the management of oligohydramnios and prevention of oligohydramnios during labour or prior to external cephalic version. No clinically important outcomes were assessed in any of the trials. Isotonic intravenous hydration had no measurable effect. Intravenous hypotonic hydration in women with oligohydramnios was associated with an increase in amniotic fluid volume (MD 1.35, 95% CI 0.61 to 2.10). Maternal hydration in women with and without oligohydramnios was associated with an increase in amniotic volume (mean difference (MD) for women with oligohydramnios 2.01, 95% confidence interval (CI) 1.43 to 2.60 and MD for women with normal amniotic fluid volume 4.50, 95% CI 2.92 to 6.08). The women were asked to drink two litres of water before having a repeat ultrasound examination. Main resultsįour studies of 122 women were included.
Normal amniotic fluid trial#
Data collection and analysisĮligibility and trial quality were assessed by both review authors. Randomised trials comparing maternal hydration with no hydration in pregnant women with reduced or normal amniotic fluid volume.
We searched the Cochrane Pregnancy and Childbirth Group's Trials Register (June 2009). The objective of this review was to assess the effects of maternal hydration on amniotic fluid volume and measures of pregnancy outcome. Simple maternal hydration has been suggested as a way of increasing amniotic fluid volume in order to reduce some of these problems. Oligohydramnios (reduced amniotic fluid) may be responsible for malpresentation problems, umbilical cord compression, concentration of meconium in the liquor, and difficult or failed external cephalic version.
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