I got one under my right boob when I was pg with Olivia and it is still there.......

I also got a few tiny tiny ones on my neck/colar bone, that popped up in my third tri when pg with Lexie......they were small to start with, and they have gone paler in colour, so they are not even really visable, but I can feel them.........so sadly, no, they don't seem to disappear after you have delivered.......I review mine in the mirror most mornings and tell myself they are my battle scars!