When does your belly button start poking out?

Every one is different. Some peoples' start to poke out by the 2nd or 3rd month whereas some peoples will not poke out until the 8th or 9th month if at all! I carried my son for 9 months, and my belly button never poked out. Some day's I would think it was going to, and I gained 80lbs while pregnant, but it never popped out. Mine stayed right where it was for the whole pregnancy