“…105 Other attempts to attenuate the estrogenic activity of steroids on the uterus by opening of the steroid nucleus, such as 9,11-seco steroids, have met with only limited success. 106,107 A synthetic steroid with weak estrogenic, progestational, and androgenic properties that has been examined clinically is Tibolone (OD-14). 108 Tibolone has been used to treat climacteric syndome without inducing endometrial stimulation.…”