Well i am o neg and the stupid woman wouldnt listen too me as i was given early injections in previous pregnancys which stopped my bleeding so if they give me this now i will actually stop!!! if they dont i will go private and sue their ass!!!! what do you guys think of this they said they wouldnt give me it until 12 weeks but read on
ANTI-D INJECTIONS
Most people are aware that there are different blood groups such as group A, B, AB and O. Each person has one of these blood groups and in addition is either rhesus blood group positive (+ve) or negative (-ve). It is also common knowledge that it is dangerous to receive a blood transfusion of an incompatible group.
A similar situation can occur if a woman who is rhesus negative becomes pregnant with a baby who is rhesus positive because a small amount of the baby's blood can leak across the placenta (afterbirth) into the mother's bloodstream. The same is true if a rhesus negative woman suffers bleeding in pregnancy for any reason, including those described above since, during the bleeding, a small amount of blood may leak into the mother's bloodstream. This can result in the mother producing antibodies called anti-D to a substance called D antigen, which exists in rhesus positive blood. If nothing is done to prevent this antibody production there is a danger that in subsequent pregnancies, the mother's body will react to a future rhesus positive baby, causing a problem called rhesus incompatibility, which can be dangerous for the baby.
This problem can be prevented by giving an injection of anti-D to rhesus-negative mothers after they have given birth, following an actual or threatened miscarriage, especially if it is after the 12th week of pregnancy or following an ectopic pregnancy or any situation where there is bleeding in pregnancy. In fact it has been proposed that in future all rhesus negative women who become pregnant and who do not already have antibodies from a previous pregnancy should be offered anti-D injections during pregnancy in an effort to reduce the numbers of babies affected by rhesus incompatibility.
all came from this site https://www.nmihi.com/b/bleeding-in-pregnancy.htm