menstrual disorders
"Before I started yaz, my periods were ridiculously heavy and the cramps that came with them were even more horrific. I've been on yaz for 8 years now, and I still love it! I have not had a cramp in 8 years and my period is REGULAR! 

My only downside is this: Several years ago studies started to show a slight increase in women getting gallbladder disease. I started yaz in December 2007 at the age of 21. By march (approx 3 mo. later), I had severe pain in my right side just under my breast. Turns out, I needed it (my gallbladder) removed. I am healthy and have never even been sick in my Life.  I'm convinced it was due to to the yaz, as nothing else in my life was different. Easy surgery/recovery though, and no problems since! Just watch out!"