17 • Hypersensitivity to the active substance or to any of the excipients. • Tumours of the ovary, breast, uterus, testis, pituitary or hypothalamus. • Undiagnosed vaginal bleeding. • Primary ovarian failure. • Ovarian cysts or enlarged ovaries, not related to polycystic ovarian disease (PCOD). • Malformations of the sexual organs incompatible with pregnancy. • Fibroid tumours of the uterus incompatible with pregnancy. • Primary testicular failure.