Gaining weight on Yaz?

if you need another pill, ask your doctor for a pill with a low level of progestin-this is what causes you to gain weight. On Yaz, I gained about 40 pounds (while on weight watchers and running 7 miles a day) and my doctor told me it was because of the progestin. I went off the pill and am going back on now, and have experienced no bad side effects whatsoever.