Infants delivered by Cesarean section are three times more likely than  delivered vaginally to fail their first hearing test, which is performed shortly after birth, new research from Israel finds.
However, the researchers noted that parents should be aware of this difference, but not alarmed, because this hearing "problem" is typically temporary.
Having a C-Section? Your Baby May Fail His First Hearing Test-- But Don't Panic! - http://www.ivillage.com/c-section-babies-may-fail-first-hearing-test/6-a-464553 
BTDT mamas- did your baby pass his/her first hearing test? If not, what was your experience like?