The pelvic bone (s) and surrounding area is expanded duing the babies growth/birth and if the bone structure is spread apart, how would it contract to it's original position? It doesn't. All the females i've encountered that had a baby, had this happen to. Just as females that had no children yet, have been still "tight". (as per person) Teenagers, 20s',30s', 40 year olds, squeeze that pinky finger hard, if no birthing had orrured yet....first child, though at any age, and whammo.....'el stretcho....thank god we guyz have it made! these females go thru heck during their life...