The present invention relates to methods for reducing testosterone levels by reduction of luteinizing hormone (LH) or independent of LH levels in a male subject and methods of treating, suppressing, reducing the incidence, reducing the severity, or inhibiting prostate cancer, advanced prostate cancer, and castration-resistant prostate cancer (CRPC) and palliative treatment of prostate cancer, advanced prostate cancer and castration-resistant prostate cancer (CRPC). The compounds of this invention suppress free or total testosterone levels to castrate levels which may be used to treat prostate cancer, advanced prostate cancer, and CRPC without causing bone loss, decreased bone mineral density, increased risk of bone fractures, increased body fat, hot flashes and/or gynecomastia.