Radio waves can be used as a source of energy to destroy abnormal tissue that should not be present and might cause harm to an otherwise healthy fetus.
The energy is administered through a very fine needle inserted into the tissue using ultrasound for guidance. It is being used more often in pregnancy than other procedures because it carries less risk to the mother and unborn baby.
Your high risk obstetrician will talk to you in detail if he or she thinks you would benefit from this procedure.