ovarian cysts
"I had my left ovary removed in September of 2015 because of a 10cm cyst that was twisting my ovary, cutting off blood supply. After my surgery they put me on birth control immediately to prevent another cyst from growing on my other ovary. Previfem has been working well for me, the only symptoms I have had have been fatigue, a little bit of weight gain (about 5 pounds) and some mood swings. Other than that I have not had any problems. My period is shorter, lighter and I no longer get cramps like I used to. Overall my experience with this birth control has been great."