Approximately one in six women are blood group RhD negative and are offered anti-D immunoglobulin prophylaxis to prevent sensitization and decrease the risk of haemolytic disease of the newborn in subsequent pregnancies. It has been thought that anti-D is harmless, but there is a risk of anaphylaxis. We describe a case of a woman with a possible immunological reaction to anti-D in her first pregnancy. A multidisciplinary team managed her second pregnancy, offering her evidence-based advice, where available, so that she could reach an informed decision regarding administration of anti-D or not. Women value individual tailored information rather than a 'one-size-fits-all' approach.