Tibolone is a synthetic steroid hormone drug, which is fairly non-selective in its binding profile, acting as an agonist at all five of the Type I steroid hormone receptors. It is used mainly for treatment of endometriosis, as well as hormone replacement therapy in post-menopausal women.
Adapted from the Wikipedia article Tibolone, under the G. N. U. Free Documentation License. Please also see http://en.wikipedia.org/wiki