Fig. 2From: Association between alcohol consumption during pregnancy and risks of congenital heart defects in offspring: meta-analysis of epidemiological observational studiesPooled Relative risk (RR). RR estimates for the association between maternal alcohol consumption and the risk of CHDs. Meta-analysis random effects estimates were used. The sizes of the squares reflect the weighting of the included studies. Bars represent 95Â % confidence intervals (CIs). The center of the diamond indicates the summary effect; the left and right points of the diamond indicate the 95Â % confidence intervalBack to article page