As far as I know, it is fairly common for any hormone treatment including birth control to hamper weight loss and even cause you to gain weight. When I was on depo-provera is when I really ballooned up to my heaviest weight, and I really feel that at least part of it had to do with the DP. I had my tubes tied not long after I started LC'ing, and hadn't had a DP shot since before I started, so I never had a chance to experience lc'ing while actively taking BC.

Robin