Non-invasive fetal RHDgenotyping for RhD negative women stratified into RHDgene deletion or variant groups: comparative accuracy using two blood collection tube types

Non-invasive fetal RHDgenotyping in Australia to reduce anti-D usage will need to accommodate both prolonged sample transport times and a diverse population demographic harbouring a range of RHDblood group gene variants. We compared RHDgenotyping accuracy using two blood sample collection tube types for RhD negative women stratified into deleted RHDgene haplotype and RHDgene variant cohorts.