Question

If the foetus is Rh${}^{+}$ and mother is Rh${}^{-}$, then which of the following situation is likely to happen ?

• A. Foetus might transmit antigen to mother's blood.
• B. Foetus might transmit antibody to mother's blood.
• C. Foetus is attacked by the antibodies of mother's blood.
• D. Foetus is attacked by the antigen of mother's blood.

Answer 1

Answer: (A)

Foetus might transmit antigen to mother's blood.

If Rh negative mother carries Rh${}^{+}$ fetus, then there are chances that fetus blood enters the mother's blood circulation and thus will transmit antigens into her. Mother's blood will produce antibodies in response these Rh antigens.