Pregnancy naturally separates a mother's outermost abdominal muscles to make room for her growing uterus. Called a diastasis, this separation doesn't fully close up in 98 percent of new moms. The larger the diastasis, the weaker the muscles and the greater chance for mom to develop back problems down the road. Of perhaps greater concern for moms, new and veteran alike, the larger the diastasis, the bigger the belly that just won't seem to go away...