The patient has being having regular antibody titres every four weeks and her titre remains 1 in 8. Her weekly MCA dopplers unfortunately shown at 26 weeks her MCA velocity has increased >  1.5 multiples of median suggestive of fetal anaemia. Fetal blood sampling and intrauterine transfusion is planned.

What are the risks to the fetus from intrauterine blood sampling? 

What are the special blood requirements for an IUT unit?

What is the false positive rate for MCA doppler monitoring up to 36 weeks?