Gynaecology & Obstetrics General 51ed3dce SERM's are used as add-back therapy concurrently with GnRH agonist to A Increase shrinkage of leiomyoma B Prevent bone loss C Avoid vasomotor symptoms D Decrease venous thromboembolism risks High-Yield Explanation SERMs are used concurrently with GnRH agonist to prevent bone loss.