Test Details: This is a test done to determine whether a woman has Rh-positive or Rh-negative blood, early in pregnancy. It is important to know the status of Rhesus(Rh) factor during pregnancy to avoid complications that may arise due to Rh Sensitization. This happens when an Rh–negative person's blood comes in contact with Rh–positive blood. In such cases the Rh Antibody Titre test proves to be helpful.