NovaSure endometrial ablation is a quick, safe, and simple procedure to lighten or stop your periods, without the side effects of hormones or the risks of hysterectomy. No pills. No hormonal side effects. It works by removing the endometrium, or the lining of the uterus (the part that causes the bleeding), with a quick delivery of radiofrequency energy. For 90% of women, menstrual bleeding is dramatically reduced or stopped.