I've been taking Yaz for 2 years. The first year my weight stayed the same (I wasn't dieting or exercising much), 1st half of 2nd I gained (from not exercising and eating milkshakes and too many carbs), 2nd half of 2nd I've lost about 40 lbs. So it had no effect on my weight.
I would say though that Yaz is only good for people who have PMDD - for everyone else, it seems to have the opposite outcome. Kind of like the meds they give hyperactive kids!
Good luck - I hope things start moving for you soon
