yup, I noticed it, at about 5 months pregnant, when my belly suddenly "popped" out a little bit . . . I hadn't gained 10 pounds yet, but maybe 6 or so pounds in that one spot, and it pulled my back out of whack and it was overnight, and oh heck it hurt. Of COURSE gaining weight on one side or the other, or the front or the back, is gonna screw up your back. Even HEALTHY pregnant women have back problems! Our AS spines are so delicate we can set them off by wearing a different pair of shoes, or carrying the groceries . . . Think about that for a minute, and you'll feel less wimpy. heehee.