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Relationship between mother's age, age at first birth and percent overall mean methylation in RASSF1 epithelial cell DNA isolated from the breast milk of 102 women. The percent overall mean methylation for RASSF1 in women who first gave birth after they turned 25 years of age is represented as “O” (older at first birth) and the percent overall mean methylation for RASSF1 in women who first gave birth before they turned 25 years of age is represented as “Y” (younger at first birth).
