ABO HDFN

Hi All

I'm looking for some stats on cases of ABO HDFN requiring intervention either in utero (IUT) or in the immediate postnatal period (exchange transfusion) to include both normal conceived pregnancy and pregnancy by assisted reproductive technology (donor egg and donor sperm). 

I'm writing up a case report for submission to a fertility journal on ABO HDFN in a donor egg pregnancy: A case of increased severity due to double A antigen expression.

I have the paper almost complete except for the background section on ABO HDFN.

Thanks in advance.

John Quigley