Dienogest is a fourth-generation progestin, an orally active synthetic progestogen with approximately 10% of the relative affinity of progesterone, but has a very potent progestagenic effect in the endometrium with some antiandrogenic activity and without any androgenic, glucocorticoid or mineralocorticoid effects. It has been used alone or in combination as a contraceptive and to treat uterine fibroids. Dienogest inhibits ovulation primarily through peripheral action rather than by central action on gonadotrophin secretion.

Dienogest is an orally active synthetic progestogen

Dienogest is used to treat endometriosis. It might also help to decrease the levels of plasma estradiol by stimulating cell death of granulosa cells in the ovary.