Following on from another thread about anti-d jabs. Does anyone know how the midwives get results from baby's cord blood if you have a home birth? When I was in hospital for DS the blood was tested and within the hour the result came back as Rh- and no need for postnatal jab. Surely it will take a long time for blood to get to path lab at hospital and then how long after will I have to wait if baby is Rh+ to have the jab? Is there a time limit?