Question

Rh antigens are separate from abo antigens and were originally discovered in rhesus monkeys. select all correct statements about rh antigen.

Answer 1

The Rh system is one of the most important and complex blood group systems because of a large number of antigens (and not only the RhD which characterizes Rh+ or Rh- blood) and the serious complications for the fetus of a woman sensitized by transfusion or pregnancy. 

The right answers are A and B

*A second Rh+ fetus is at risk for hemolytic disease of the newborn in Rh- mom womb. Because the mother is immunized against the erythrocytes' antigen of its child, so these will be destroyed by her immune system.

*ABO antibodies are automatically made during its maturation in the mom's womb. Bur rhesus antibodies are not, they are synthesized after an antigenic stimulation by a rhesus antigen.

Answer 2

Answer;
Rh antigens are separate from ABO antigens and were originally discovered in Rhesus monkeys. Some correct statements about Rh antigens are;
An Rh- mom carrying her second Rh+ fetus is at a risk for hemolytic disease of the new born,
Anti-Rh antibodies are not automatically made, unlike the antibodies in ABO blood groups.