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Comparison between the detected maternal serum levels of Cd (A), Hg (B) and As (C) in the three groups of our cohort. AGA: appropriate for gestational age; IUGR: intrauterine growth restriction; SGA: small for gestational age. Cd: cadmium; Hg: mercury; As: arsenic Kruskal-Wallis and Mann Whitney tests were used. * p<0.05, **p<0.01, ***p<0.001.
