- correct use of contraception methods. The following are acceptable: hormonal contraceptives (combined oral contraceptives and oestrogen-free pills with desogestrel, implants, transdermal patches, hormonal vaginal devices or injections with prolonged release), intrauterine device (IUS) or a barrier method, e.g. condom or occlusive cap (diaphragm or cervical/vault caps) with spermicide (foam, gel, film, cream or suppository)