Ethinyl estradiol / norethindrone
"I have been using Loestrin 24 for at least 3 years now, with no problems whatsoever.  I've never had breakthrough bleeding.  I did not experience weight gain or any abnormal side effects. And my periods have been light, and very predictable.  I'm going to try Seasonique starting in a few days. (I just like the idea of only having 4 periods a year). I have a feeling though, that I'll end up switching back to Loestrin, because it was been very reliable for me."