Send us Fan Mail Do we really need a DAT on every baby born to a group O or Rh-negative mother? This week on Journal Club, Ben and Daphna dig into a new Pediatrics study questioning routine Direct Antiglobulin Testing (DAT) in low-risk neonates with ABO or RhD incompatibility. Using data from over 1,300 infants, the authors found that transcutaneous bilirubin alone predicted the need for phototherapy just as well as DAT in ABO-incompatible babies, and that passive anti-D from RhoGAM rarely ca...