Kim Perell says it was hard growing up with a twin sister. She encourages her twins to be individuals and not compare ...

Fraternal twins develop in their own amniotic sac with their own placenta to provide oxygen and nourishment. So in a sense, while they're sharing a womb, they're not having to share everything.

MALCOLM RITTER, AP Science Writer - 12/30/02 Dec 29, 2002 Dec 29, 2002 0 ...

So not everyone would. As far as the fraternal twins, they should be no more likely necessarily than other siblings, who share half of their genetic make up.

But since they’re fraternal twins, not identical, many didn’t even know they were related. “People didn’t even know we’re siblings for four years, until today,” Victoria said.