Ethinyl estradiol / etonogestrel
"The easiest birth control I ever took, I couldn't feel it at all, even during sex. My partner said he couldn't feel it either. Then only down side was the side effects, I'm a pretty tiny girl (5"7 under 120 pounds) and the ring made me really nauseous, unbelievably tired, my entire body was sore especially in my legs and overall made me feel a little weird. I didn't like how it was making me feel and after a couple of days of feeling really crappy I had to take it out. I felt normal after 2 days without it and haven't put it back in since. Might consider something else for next month."