my husband is AB+ and im O+ and our DS is B+ ,
Because we all have positive blood groups then we arent RH neg so i dont need Anti D when pregnant , however there are other blood type conflict disorders one of which affected my DS at birth and he ended up in the Neo-Natal unit for a few days, they cant screen sucessfully for many causes of HDN ( what make my son so sick he was suffering from an ABO HDN complication ) except for the RH negative one and anyone pregnant who is RH neg should get 2 Anti D shots during pregnancy and one just post birth and the baby will be observed, some cases need extra Anti D and they reccomend getting a shot if you have any bleeding or accidents which impact your bump, you would have been notified after your booking bloods were processed if you were RH Neg