A

Post-partum anti-D immunoglobulin is still required, but only if the newborn is Rh-positive (or the blood group is unknown). Standard recommendations give one antenatal dose at 28 weeks and a second dose within 72 hours of delivery if the infant is Rh-positive; no dose is needed when the baby is Rh-negative [ACOG, 1999, PMID 10458556; Lubuský, 2010, PMID 20925231].