The imprinting epigenetics are defined by the inheritance of epigenetic tags from cell generation to cell generation and from the parents to their offspring.
The epigenetic tags on imprinted genes usually stay put for the life of the organism. But they are reset during egg and sperm formation. Regardless of whether they came from mom or dad, certain genes are always silenced in the egg, and others are always silenced in the sperm
Related Journals of Imprinting Epigenetics
Journal of Clinical Epigenetics.