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Journal Article
Randomized Controlled Trial
The effect of fish oil supplementation on maternal and neonatal outcomes: a triple-blind, randomized controlled trial.
Journal of Perinatal Medicine 2017 December 21
OBJECTIVE: To evaluate the effect of fish oil supplementation on pregnancy outcomes in mother and newborn.
METHODS: This randomized, triple-blind, placebo-controlled trial was conducted on 150 pregnant women aged 18-35 years from Feburary 2014 to April 2015 in Tabriz, Iran. Participants were assigned to receive either 1000 mg fish oil supplements containing 180 mg eicosapentaenoic acid (EPA) and 120 mg docosahexanoic acid or placebo from week 20 of gestation to birth. The primary outcome measure was birth weight. Gestational duration, preterm labor low birth weight (LBW), length, head circumference, and maternal serum docosahexaenoic acid (DHA) and EPA level at 35-37 weeks were also examined. The statistical analysis was on an intention-to-treat basis.
RESULTS: Demographic characteristics were similar in both groups (P>0.05). The mean (SD) birth weight values in the fish oil and placebo groups were 3256 (362) g and 3172 (447) g, respectively (adjusted mean difference (MD)=84.1 g, 95% confidence interval [CI]=-24.8 to 193.2). Five (7.6%) neonates in the placebo versus no case in the fish oil group were born with LBW (P=0.02). The rate of preterm labor was lower in the fish oil group (adjusted OR=0.74, 95% CI=0.16-3.42). However, there were no statistically significant differences in the maternal outcomes (P>0.05) with the exception of the proportion of maternal serum DHA fatty acid at 35-37 weeks (P<0.001).
CONCLUSION: Although low dose fish oil supplementation increased birth weight, its effect was not statistically significant. The frequency of LBW was significantly reduced in the intervention group, but the observed reduction needs to be confirmed in future larger investigations using different doses of omega-3.
METHODS: This randomized, triple-blind, placebo-controlled trial was conducted on 150 pregnant women aged 18-35 years from Feburary 2014 to April 2015 in Tabriz, Iran. Participants were assigned to receive either 1000 mg fish oil supplements containing 180 mg eicosapentaenoic acid (EPA) and 120 mg docosahexanoic acid or placebo from week 20 of gestation to birth. The primary outcome measure was birth weight. Gestational duration, preterm labor low birth weight (LBW), length, head circumference, and maternal serum docosahexaenoic acid (DHA) and EPA level at 35-37 weeks were also examined. The statistical analysis was on an intention-to-treat basis.
RESULTS: Demographic characteristics were similar in both groups (P>0.05). The mean (SD) birth weight values in the fish oil and placebo groups were 3256 (362) g and 3172 (447) g, respectively (adjusted mean difference (MD)=84.1 g, 95% confidence interval [CI]=-24.8 to 193.2). Five (7.6%) neonates in the placebo versus no case in the fish oil group were born with LBW (P=0.02). The rate of preterm labor was lower in the fish oil group (adjusted OR=0.74, 95% CI=0.16-3.42). However, there were no statistically significant differences in the maternal outcomes (P>0.05) with the exception of the proportion of maternal serum DHA fatty acid at 35-37 weeks (P<0.001).
CONCLUSION: Although low dose fish oil supplementation increased birth weight, its effect was not statistically significant. The frequency of LBW was significantly reduced in the intervention group, but the observed reduction needs to be confirmed in future larger investigations using different doses of omega-3.
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