With a view to ensuring a high level of safety for donors, INVICTA adheres to EU directives and standards described by medical societies operating at home and abroad. They stipulate that a woman can take part in the programme no more than 6 times. This number is also recommended by the Polish Gynaecological Society. INVICTA also introduces an additional restriction – the egg cells from one donor can be used in the successful treatment of a maximum of 10 couples.