| Type | MGI:General | Description | pups and fetuses from homozygous females immunized two or four times with wild-type platelets, respectively, and mated with wild-type males exhibit hemorrhaging, reduced platelets and increased mortality, a phenotype similar to human fetal and neonatal alloimmune thrombocytopenia heterozygous pups from non-immunized females mated with wild-type males exhibit normal platelets counts, indicating that maternal antibodies of the pregnant females and not pup genotype is responsible for the reduced platelets and hemorrhaging in heterozygotes |