![]() ![]() We encourage everyone who is healthy to make an appointment to donate blood, regardless of your blood group. If you have Rh negative blood, please donate regularly (at least twice a year) to help maintain our blood stocks and save lives. When this happens, it is more difficult for the blood stock to recover as the proportion of donors with Rh negative blood is very small. Rh negative blood stock may also dip during festive seasons and long holiday periods. Ideally, we need to maintain a 12-day stockpile for Rh negative blood to respond to civil or medical emergencies in Singapore.Īny sudden increase in the Rh negative blood usage, for instance, when a patient with a specific Rh negative blood group suffers a massive blood loss due to surgery, can cause the Rh negative blood stock to drop. The challenges of maintaining a sufficient blood stock This is to prevent them from developing antibodies to the Rh antigen, which can lead to potentially serious pregnancy complications in the future. This can be potentially life-threatening. Among the more exotic theories is the idea that the Rh-Negative gene represents a separate branch of humanity that intermarried with the branch that came out of Africa. This is because Rh positive blood increases their risks of developing antibodies to the Rh antigen, which may lead to increased breakdown of the transfused blood and adverse transfusion reactions. This has led to speculation that Rh-Negative blood is related to Cro-Magnon ancestry going back to the upper Paleolithic period in Europe. A very small number of people have whats called Rh null blood (also called gold. Patients with Rh negative blood group are recommended to receive Rh negative blood. For example, some people have A positive blood while others have A negative. Why it is crucial to maintain a sufficient blood stock Rh-negative blood types make up about 10-15 of the population, leaving scientists scratching their heads at the question: Where the heck did this blood type originate. Rh negative blood such as A-, B-, O- and AB-, does not have the (D) antigen on the surface of the red blood cells. ![]() People who have the antigen on the surface of their red blood cells have Rh positive blood such as A+, B+, O+ and AB+. The Rh (“Rhesus”) blood group antigen (D antigen) is a protein found on the surface of red blood cells. If you have Rh negative blood, please donate regularly (at least twice a year) to help maintain our blood stocks and save lives. From these early experiments, he identified three types, called A, B and C (C was later to be re-named O for the German Ohne, meaning without, or Zero. Hence, it is crucial to maintain a sufficient blood stock of Rh negative blood. Group O Rh negative blood is recommended for the emergency transfusion of females with current or future child-bearing potential before their blood groups can be tested, if they have a higher likelihood of being Rh negative. Patients with Rh negative blood group, requiring a blood transfusion, are recommended to receive Rh negative blood. Rh negative blood is found most commonly in Caucasians and Indians. ![]() Only about 1.5% of our donor population are Rh negative. ![]()
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