Transplacental crossing is not seen in –
Iso immune haemolytic anemia
Rh–haemolytic anemia
Toxoplasmosis
Toxic erythema
Toxic erythma is a normal finding in newborn.
In Rh incompatibility and ABO incompatibility antibodies can cross placenta and cause erythroblastosis fetalis.
Toxoplasmosis can cross placenta.