She would have died, apparently, without Hank McCoy. But they were both fine, despite the Sentinel attack that was happening at the same time.
Well, Celeste, Phoebe, and Mindee are still alive. They're way older than the rest of us, though. Rachel's there as well, but no, there were only the three of us that were born the traditional way. The rest are just. . . Summerses.