I had lost 70 pounds before my hysterectomy and even though I was walking the next day and got back into my exercises as soon as i could...I gained weight. Back up 50 pounds. I was doing the same thing as before but gaining! The doctor just told me that my body would adjust to the hormone changes, balance out and I would lose it again. It's been two years and I was so discouraged, I gave up for awhile...but I felt better when I was exercising regularly and am back at exercising and I do feel better...and the weight is slowly coming off. It's discouraging but hormones do play a part. I couldn't take any hormones so that might make a difference.