Bow Wow Name Left Off Child's Birth Certificate

Joie Chavis tells TMZ ... she was shocked that B.W. wasn't there for her when she went under the knife for an emergency C-section on April 27. And if Bow Wow's excuse was squeamishness, it didn't explain his absence in the days that followed.

He finally showed up on the 6th day of the baby's life, to take them home. Pissed as she was, Joie tells us Bow Wow has turned it around and now is all about baby Shai.