Global DNA Methylation (5-mC) levels were measure in (A) day 8 (stage 34) embryonic hearts (n=6/group) and (B) day 3 (stage 19–20) embryonic hearts (n=8/group). On day 8, Ethanol significantly lowered DNA methylation levels compared to saline and GSH, p=0.031. DNA methylation was normalized when glutathione was co-administered with ethanol. However, in day 3 (stage 19–20) hearts, ethanol did not change DNA methylation levels. All results are reported as percent of DNA with detected 5-mC. Saline = Sal-Ctrl, GSH alone in Saline = GSH/Sal, Ethanol = EtOH, Ethanol + GSH co-injections = EtOH+GSH.