Babies may be U.S. 's second set of live-born octuplets , California hospital says . Comment: Octuplets delivered by Caesarean section Monday morning . Three require breathing assistance ; next seven days will be critical , doctor says .
Babies may be U.S. 's second set of live-born octuplets , California hospital says . Doctors expected seven babies , did n't know of eighth until delivery . Octuplets delivered by Caesarean section Monday morning . Three require breathing assistance ; next seven days will be critical , doctor says .