abnormal uterine bleeding
"From about 4th grade onward, I experienced semiannual ovarian cysts that caused me severe pain and made me stay out of school for several days.  Even when they did figure out what it was, the doctors mainly had me stay on Ibuprofen to stave off the pain.  Finally, when they realized that it wasn't working that well and that the cysts kept coming back, my OBGYN suggested that I start taking this medicine to regulate the hormones that were likely causing my cysts.  Ever since I started taking this medicine several years ago, I haven't had a single cyst and have only had minor side effects.  I still PMS on my "period," and I still get cramps on occasion, but for the most part everything is fine.  I do think it causes bloating at times."