Question

If husband is ${Rh}^{+}$ and wife is ${Rh}^{-}$ then

• A. no problem with first child
• B. second child would have anaemia (erythroblastosis foetalis)
• C. second child would be normal
• D. Both (a) and (b)

Answer 1

The correct option is D Both (a) and (b)

Erythroblastosis fetalis is a condition which arises when a female is rhesus negative and the male is Rh positive.

The child from such a couple inherits the Rh positive trait from the father.

The Rh-positive red blood corpuscles of a foetus in the womb enter the blood of the mother where the development of Rh antibodies takes place in the mother's blood.

These antibodies along with mother's blood on reaching the fetal circulation cause the clamping of fetal RBC. The first child is born normal because by that time the number of antibodies in mother remain lesser but they increase with successive pregnancy.

Hence, the correct answerer is 'Both (a) and (b)'