Question

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Class 11 Important Questions for Biology -

●What physiological circumstances lead to erythroblastosis fetalis?​

Answer 1

Answer:

Circmutances that lead to erthroblastosis fetalis:-

It can occur when RH factor blood types mixed during pregnency .It can happen RH+ and RH- blood mixes .

It is also caused by the transfer o maternal antobodies to fatal red blood cells .

hope it helps ❤❤

Answer 2

Answer:

The antigens of the foetus do not get exposed to the ${{Rh}^{-}}$ blood of the mother in the first pregnancy. However, during the delivery of the first child, there is a possibility of exposure of the maternal blood to small amounts of the ${{Rh}^{+}}$ blood from the foetus. In such cases, the mother starts preparing antibodies against Rh antigen in her blood.

In case of her subsequent pregnancies, the Rh antibodies from the mother (${{Rh}^{-}}$) can leak into the blood of the foetus ${{Rh}^{+}}$). This could cause severe anaemia and jaundice to the baby. This condition is called erythroblastosis foetalis.

hope this will help u:)