Just to add to what others have already said... Your prenatals and babies don't need second types unless they are for transfusion, which I assume most of them are not. We built more than just "Yes" and "No" to result the History Check field: No Previous History, Previous History Negative, History of an Antibody, ABO/Rh History Only. Then there is a separate field "Retype Needed?" which is yes/no, with yes reflexing a retype with no charge attached. The tech has to look at the situation and decide if a retype is needed. We have the OB docs order "Type" and "Antibody Screen" as 2 tests for prenatals (instead of "Type and Screen" which is for possible transfusions). And a type on a baby is a different order because it was built to include the weak D results if needed. Those don't have the "Retype Needed?" field at all.