According to TMZ, the babies were born prematurely and are being treated for jaundice. The pair have not left the hospital and it was reported doctors had opted to keep them in for a 'minor issue.'
Beyonce's twins were premature and are "under the lights" to normalize ... this according to sources connected with the family.
TMZ broke the story ... the twins have been in the hospital since their birth with a "minor issue."
http://www.tmz.com/2017/06/20/beyonce-jay-z-twins-premature-bilirubin/