I am 28 years old female and married. I am working in radiology department as a radiographer. We are planning for our baby in next 1/2 mths. My blood group is a negative and my husbands blood group is b positive. I read in books that their should be any complication in conceiving can be occur when couple's blood group are mismatched. So I want to ask which precautions and treatment should be taken before conceiving and during the pregnancy period.?