Dear All I am writing a paper and I am finding difficulty sourcing a reference for the following statement I am making in the paper. I know I have read it somewhere but for some reason I cannot find it now Background: once an Intrauterine transfusion has happened, the transfusion procedure itself is known to increase antibody levels. Therefore carrying out serial quantitations post IUT are unnecessary as the patient will be closely monitored by MCA Doppler US. Best wishes John