abnormal uterine bleeding
"I have been on this pill for two years.  The first couple months I had a lot of nausea and sickness.  For the rest of the time, I would either have two periods a month, every other week, but they were fairly light, or go months at a time with no bleeding at all.  I'm switching to a different pill now just because I need a generic form and there isn't one yet for Loestrin 24"