Sperm cells carry traces of #childhood stress, epigenetic study findsNew research, published in the journal Molecular Psychiatry, looked at the "epigenetics" of the sperm cells of #fathers who had been exposed to high #stress in childhood. Epigenetics involves how DNA — the blueprint used to build the proteins and molecules that make up our bodies — is read. Epigenetics doesn't change DNA's underlying code but rather alters which genes can be switched on.