Composition comprising a combination of an aromatase inhibitor, a progestin and an oestrogen and its use for the treatment of endometriosis

Disclosed is the use of a combination of an aromatase inhibitor such as atamestane, formestane, fadrozole, letrozole, pentrozole, anastrozole and vorozole, a progestin such as norgestrel, levonorgestrel, norethindrone, norethindrone acetate, desogestrel, norgestimate and ethynodiol diacetate, and an estrogen such as ethinyl oestradiol and mestranol, in the manufacture of a medicament for the treatment of endometriosis.