Answer:

octuplet

AnswerCrossword Clue
OCTUPLETSurprise birth
OCTUPLETExceedingly rare infant
OCTUPLETRare birth occurrence
OCTUPLETAny of Apu's children, on "The Simpsons"
OCTUPLETOne with the same birthday as seven siblings
OCTUPLETOne of eight
OCTUPLETExtra-special delivery?