There is no magic number. It is when you 'feel' recovered enough to take that step. Just take things slowly, see how it goes and be prepared to stop if it is painful (because you don't want to reopen the wound).


Personally I had bad third degree tearing (too many stitches - internal and external - to count) with my first and I was healed enough until the 6month mark (and the area was still sore and tender until the 12month mark).