Abstract: An apparatus for proliferation of organic tissue by exposure to electromagnetic field is disclosed that comprises an electromagnetic patch 101 comprising one or a plurality of electromagnetic coils 103 each generating an electromagnetic field; and a battery powered drive unit 102 which supplies signals to the electromagnetic coils for applying a particular dosage of electromagnetic field to a target tissue region. The electromagnetic patch 101 is specifically customised to an individual subject user and to an individual body portion and tissue region of said individual user. The drive signal sequence is individually tailored to the electromagnetic patch for delivering a particular dosage programme of electromagnetic field for the particular subject user.