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What is recess system? Explain with …

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What is recess system? Explain with the blood group with negative women and positive man of second child does not survive

Posted by Mohd Shaikh Mansuri 4 years, 6 months ago

CBSE > Class 11 > Biology

1 answers

Priya Pathak 4 years, 6 months ago

Suppose if the blood group of mother is B- and if the first baby she concieve have blood group B+, so during the first delivery some blood of baby enters mother's body and her bodies forms antibodies against this +ve antigen.....when she concievs second baby of having +ve blood , the antibodies form by mother's blood during her first delivery can cross placenta and act against baby and harm the foetus leading to anaemia, jaundice or may even cause death of foetus.....This is erythroblastosis foetalis

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