Sensitivity of RBCs to various drugs occurs later. These groups should be screened during the neonatal period. Because of the increasing incidence of HIV infection, neonatal testing is recommended and is required in some states. Positive results may indicate undetected maternal disease and necessitate follow-up of the infant. Those with a positive indirect Coombs' test should be watched for jaundice.
Many experts routinely measure total bilirubin on discharge.
The infant's growth rate should be monitored using a growth curve with percentiles. The infant's developmental level and performance should be assessed at each visit. Internal tibial torsion is common and may need orthopedic evaluation. Auscultation should be performed to identify murmurs, and femoral pulses should be palpated at each examination. When the femoral pulses are diminished or absent, coarctation of the aorta should be suspected.