There are no clear guidelines as regards the number of attempts at the procedure. It will vary for different patients. It is worth keeping in mind that in every case, the qualification to the procedure is carried out by an experienced physician, on the basis of test results and observations of the patient’s condition. If there are any medical contraindications or any serious risks, the procedures are not carried out. Moreover, the patient receives psychological support, so she can also give some thought to her motivation and decisions.