Haemolytic disease and the rheasus blood group....

[Cheman]

Why do you get haemolytic disease in a baby ( not first baby) if the mother is Rh- and her anti D antibodies cross the placenta, yet it is fine to tranfuse Rh- blood to a Rh+ recipient, which will also contain anti D antibodies?

Thanks in advance. :wink:

[Cheman]

I've just noticed there is a slight flaw in my question 4get it. :smile: Sorry.