Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Growth inhibition (GI) is a medical term pertaining to cancer therapy and the specific reduction in growth of tumors and oncogene cells by a chemical compound, mechanical therapy (e.g. electroporation), radiation, gene therapy, protein therapy, ultrasound waves, light, or other treatment. Measured in micromoles/liter or micrograms/liter. Electroporation, or electropermeabilization, is a significant increase in the electrical conductivity and permeability of the cell plasma membrane caused by an externally applied electrical field.