Each person has two Rh factors in their genetics, one from each parent. The only way for someone to have a negative blood type is for both parents to have at least one negative factor. For example, if someone's Rh factors are both positive, it is not possible for his or her child to have a negative blood type.
A person with the Rh positive factor will not make anti-Rh antibodies. Those with Rh negative factor will produce the antibodies. Therefore, someone with Rh+ blood can receive both Rh+ and Rh- transfusions, but those with Rh- can only receive Rh- blood.
Rh-negative frequencies of about 29% were documented among Basques and in distinct populations living in the High Atlas Range of Morocco [25], which have the highest reported prevalence of Rh-negative phenotypes apart from that from Saudi Arabia above.
Blood groups in Australia
According to Australian Red Cross Lifeblood, the percentage of blood group frequency in Australia is: O positive - 40% O negative - 9% A positive - 31%
Rh factor is a protein that's found on some people's red blood cells. If your red blood cells have the protein, you're Rh-positive. If your red blood cells don't have the protein, you're Rh-negative. Being Rh-positive or Rh-negative doesn't affect your health.
Having an Rh negative blood type is not an illness, and it usually does not affect your health. But it can affect pregnancy. Your pregnancy needs special care if you're Rh negative and your baby is Rh positive. That's called Rh incompatibility.
Severe cases of mismatched Rh status can lead to diseases such as anemia or brain damage in the baby. In the most severe cases, it can even be fatal. If you are pregnant and discover that your baby has a different Rh status, don't panic. Fortunately, there are injections pregnant women can have to avoid this reaction.
During pregnancy, some fetal blood cells may occasionally escape into the mother's circulation, exposing her to potentially Rh positive blood cells. If this occurs, an Rh negative mother's immune system will recognize these cells as foreign and produce antibodies against them called anti-D antibodies.
We found that 1646/1686 (97.6%) of Aboriginal individuals were RhD positive, compared with 2225/2657 (83.7%) of non-Aboriginal individuals.
Whilst only 6.5% of the Australian population are group O RhD negative, group O RhD negative red blood cells have represented up to 17% of issues to Australian health providers.
Basques were found to have the highest incidence of Rh negative blood of any people in the world, significantly higher than the rest of Europe, even significantly higher than neighboring regions of France and Spain.
Of the eight main blood types, people with Type O have the lowest risk for heart attacks and blood clots in the legs and lungs. This may be because people with other blood types have higher levels of certain clotting factors, which are proteins that cause blood to coagulate (solidify).
A baby may have the blood type and Rh factor of either parent, or a combination of both parents. Rh factors follow a common pattern of genetic inheritance. The Rh-positive gene is dominant (stronger) and even when paired with an Rh-negative gene, the positive gene takes over.
Whilst “golden blood” is still part of the Rh system, it is the rarest known type. It is Rh-null: 61 Rh antigens are absent in it. If you're Rh negative, you still have some Rh proteins but you have more missing than you have present. If you're Rh-null, you have none of these antigens at all.
Fifteen percent (15%) of the population has Rh negative blood and the rest are Rh positive. Being Rh negative is not a disease. It is just an inherited trait, the same as eye color. When a woman is pregnant, it is important to know if she is Rh negative.
The Rh factor is inherited, meaning it is passed from parent to child through genes. The fetus can inherit the Rh factor from the father or the mother. Most people are Rh positive, meaning they have inherited the Rh factor from either their mother or father.
Individuals negative for Rh(D) were at decreased risk for both intubation and death, consistent with a lower risk of initial infection. Overall, we estimate between 0.1 and 8.2 percent absolute risk differences between blood groups, after adjusting for race and ethnicity.
The greatest problem with the Rh group is not so much incompatibilities following transfusions (though they can occur) as those between a mother and her developing fetus. Mother-fetus incompatibility occurs when the mother is Rh- (dd) and her fetus is Rh+ (DD or Dd).
Of all the negative blood types (AB-, O-, A-, and B-), those of Asian descent have the lowest percentage. These figures highlight the fact that it is not a common blood type in Asia. This in turn means that hospitals and medical facilities will not usually keep a large stock of Rh negative blood.
RH negative blood, compared with the common A, B and O types, is a variety highly unusual in China. With only 0.1% to 0.3% of the population having this blood running through their veins, it is therefore referred to as "panda blood." Rare as the blood type is, people with RH negative blood must not be ignored.
Blood is further classified as being either "Rh positive" (meaning it has Rh factor) or "Rh negative" (without Rh factor). So, there are eight possible blood types: O negative. This blood type doesn't have A or B markers, and it doesn't have Rh factor.
Rh status is inherited from our parents, separately from our blood type. If you inherit the dominant Rhesus D antigen from one or both of your parents, then you are Rh-positive (85% of us). If you do not inherit the Rhesus D antigen from either parent, then you are Rh-negative (15% of us).