My Belly Button, started to change shape at 18 weeks, by 24 weeks there was still a small indentation, now at 28 weeks - it`s totally flat (has been flat for approx 2 weeks now), still time to tell if it will actually 'pop', my DH loves nothing more then to fiddle with it but it seems so much more sensitive that I squirm everytime he touches it and of course he gets a reaction so he keeps doing it.

Take Care

Deeanne