The data suggest that the alterations to which genes are turned on or off survive at least two generations: the one that suffered in the womb during the famine, and their children.
They may go much further. A 2011 study published by researchers at the Salk Institute in La Jolla, California, demonstrated epigenetic mutations that lasted for at least 30 generations in plants. So far, we haven't proved such long-term changes in humans but there are hints that epigenetics cascades through the generations.
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