I have had a child yes. I think they do as there is a midline bulge down the centre of my tummy.
Going to go see the GP later this week to find out more about it all. The skin is already red around the crease just above my pubic line which should help, along with my existing medical problems.
All the documents I've read from the PCT don't mention other skin folds, only abdominoplasty, so that's a bit disheartening as my thighs are already causing me discomfort.