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Forest plots of the effect of low-dose aspirin initiated on the risk of neonatal adverse outcomes. df, degrees of freedom; M-H, Mantel-Haenszel; CI, confidence interval; ASA, acetylsalicylic acid; IUGR, intrauterine growth retardation; SGA, small for gestation age infant; IV, inverse variance. Black diamonds indicate the weight of each study; blue squares indicate the overall result; horizontal lines indicate the sample size of the studies.
