when a pregnant mother have negative rh and the first child is born some antigens are formed then why does the 2nd child have problem if she has a positive rh ?and why does the mother not become completely immune to the rh positive blood?
B'coz after the tym of first baby's birth she is advised to take the medicines which make the mother's blood to handle the antigens of rh -ve blood. bt she doesn't gt completely immune b'coz of diff. rh grouping.