it you are 100% sure you and DP are both - and are both the parents of the child (that sounds so horrible and i'm sorry, but we never assume =( )

then yes, your baby will be -
Ha! I understand He is definitely the father and is definitely A- (he says the only things negative about him is his blood type - pfft!). He is definitely A- because his mother was working in blood pathology when she had him and checked all her kids blood types after they were born.