a group of drugs which reduce a woman's estrogen levels; these drugs are used to treat endometriosis and reduce the size of fibroids. These drugs prevent ovulation and cause an artificial menopause. They may cause symptoms similar to the menopause, and can also cause bone mineral loss eventually leading to osteoporosis. For these reasons, GnRH agonists are most often a temporary treatment, relieving symptoms until other approaches can take effect

A class of hormone-based medications that lower a woman's estrogen levels. They can offer temporary relief from uterine conditions that are driven by estrogen, such as endometriosis and uterine fibroids. Typically they are reserved for short-term use because of their side effects, which include the menopausal symptoms triggered by estrogen deprivation: hot flashes, vaginal dryness, and some bone loss.