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There are several reasons why it is important to know your blood type. Firstly, in the case that you require a blood transfusion, it is crucial to receive blood that is compatible with your own blood type. Secondly, knowing your blood type can help ensure a safe pregnancy, as there may be complications if a pregnant woman has Rh-negative blood and the baby has Rh-positive blood. Additionally, knowing your blood type can help you to donate blood in times of shortage, as certain blood types are rarer than others. To find out your blood type in Australia, you can make an appointment with the Australian Red Cross Blood Service or take a blood type test.
| Characteristics | Values |
|---|---|
| Blood group classification systems | ABO blood group system and the Rhesus (Rh) type system |
| Blood groups | A, B, AB, or O, and Rhesus (Rh) positive or negative |
| Number of blood groups | 8 main blood groups |
| Blood group determination | Presence or absence of certain antibodies in blood plasma and antigens on the surface of red blood cells |
| Blood group antigens | A and B |
| Blood donation | Can save someone's life and be turned into different medical treatments |
| Blood transfusion | A blood test is done to check compatibility |
| Universal donor blood type | O negative |
| Universal plasma donor blood type | AB |
| Rare blood types | Determined by the presence or absence of more than 300 other known antigens |
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Blood typing tests
There are several instances where determining one's blood type is necessary. For example, blood typing is done during pregnancy to ensure the mother and the baby have compatible blood types. It is also routinely performed before blood transfusions to prevent potentially fatal transfusion reactions. Additionally, blood typing can be used to determine if two people are likely blood relatives.
Alternatively, blood typing can be done through a standard blood test, such as those offered by i-screen, which provides a private health analytics dashboard for individuals to access their results. It is important to note that, unlike other blood tests, fasting is not required for blood typing tests.
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Blood donation
You can donate blood to Australian Red Cross Lifeblood, which operates blood donor centres and mobile units across the country. To donate blood, you must meet certain eligibility criteria. You can check if you're eligible on the Australian Red Cross Lifeblood website. Even if you're generally healthy, you should wait to donate blood if you're experiencing any symptoms, even mild ones like a runny nose. You may also need to wait to donate blood or plasma after receiving a vaccination, depending on the type of vaccination.
When you go to donate blood, bring identification, such as your driver's license, passport, or digital donor card in the Donate Blood app. The staff will check your haemoglobin levels with a finger-prick test to ensure it's safe for you to donate. After donating, you'll be asked to rest for a few minutes, and then you can go to the refreshment area, where you should stay for another 15 minutes to have a drink and a snack.
Don't know your blood type? Don't worry—you can still donate blood, and they will test your blood and let you know. Blood type is important when it comes to donating blood, as recipients need to receive blood that's compatible with their own. There are four main blood groups: A, B, AB, and O, which are determined by the presence or absence of two antigens, A and B, on the surface of red blood cells. There are also eight common blood types that include the presence or absence of the Rh factor: A+, A-, B+, B-, O+, O-, AB+, and AB-. People with type O blood are considered universal donors, as they can give blood to anyone without triggering their immune system. However, they can only receive type O blood.
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Blood transfusion
To find out your blood type in Australia, you can take a blood type test. This is often done before a person receives a blood transfusion, but you can also book a donation and be informed of your blood type.
The most common blood group in Australia is O positive, with about 40% of people having this blood type. O negative blood, on the other hand, is known as the "universal donor" as it can be given to almost anyone. In emergencies, O- blood is used if there is no time to match the blood type as it lacks antigens that would trigger an immune response.
Before a blood transfusion, testing is done to ensure compatibility between the donor and recipient blood. This includes ABO and RhD blood group tests, a blood group antibody screen, and a crossmatch. These tests are crucial to ensure the safety of the recipient and the success of the transfusion.
Blood typing is also important for pregnant women, as there is a possibility of incompatibility between a mother and her baby's blood types, which may require treatment during pregnancy.
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Pregnancy
During pregnancy, you'll be offered various blood tests and ultrasound scans. One of the tests will be to determine your blood type, which is important to know in case you need a blood transfusion. This could happen if you experience anaemia or heavy bleeding during pregnancy or childbirth.
Your blood type is determined by antigens on the outside of your blood cells. Your blood group is determined by genes passed to you by your parents. Your blood type has two parts: the ABO group and the Rhesus group. If you have a blood transfusion that is incompatible with your blood type, your immune system will attack it.
In addition to finding out your blood type, the blood test will also determine your Rhesus (RhD) factor. You can be RhD positive or negative. If you are RhD positive, this means you have the RhD protein on the surface of your red blood cells. If you are RhD negative and your baby is RhD positive, your body may produce antibodies against your baby's blood. These antibodies can cross the placenta and destroy your baby's blood cells, leading to a condition called haemolytic disease of the newborn. To prevent this, an anti-D injection is offered at 28 and 34 weeks of pregnancy. A genetic screening test called the Rhesus D non-invasive prenatal test (RHD NIPT) can be done from 11 weeks of pregnancy to predict the RhD antigen status of the unborn baby.
Another blood test that may be offered during pregnancy is the oral glucose tolerance test (OGTT) to check for gestational diabetes. This usually develops in the second and third trimesters and typically disappears after childbirth. However, it increases the likelihood of developing type 2 diabetes later in life.
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Health risks
Blood types are classified using the ABO blood group system and the Rhesus (Rh) type system. The former categorises blood types into A, B, AB, and O, while the latter identifies the presence or absence of the Rh factor, resulting in either Rh-positive or Rh-negative blood.
Blood type has been linked to varying health risks, including:
- Heart Disease: People with A, B, and AB blood types have a 6% greater risk of developing coronary heart disease.
- Stroke: There is a correlation between certain blood types, particularly A and O, and the risk of experiencing a stroke before the age of 60.
- Cancers: Certain blood types are associated with a higher risk of developing specific cancers, including stomach cancer.
- COVID-19: Research suggests that individuals with Type A blood may be more susceptible to contracting COVID-19 and experiencing severe symptoms, while those with Type O blood may have a lower risk. However, another study disputes this connection, emphasising that any blood type can experience severe COVID-19 symptoms.
- Memory Issues: Individuals with A, B, and AB blood types have an 82% greater likelihood of developing memory issues compared to those with Type O blood.
It is important to note that while blood type may influence these health risks, other factors, such as lifestyle choices and environmental factors, also play a significant role in an individual's overall health. Additionally, the understanding of the relationship between blood type and health risks is still evolving, and more research is needed to establish definitive conclusions.
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Frequently asked questions
You can find out your blood type by taking a blood type test. This is often done before a person gets a blood transfusion and to check a pregnant woman's blood type. You can make an appointment with the Australian Red Cross Blood Service to find out your blood type.
Knowing your blood type is important for several reasons. Firstly, to avoid transfusion with incompatible blood, which can result in a severe immune reaction or even death. Secondly, it is important for a safe pregnancy. If a pregnant woman has Rh-negative blood and the baby has Rh-positive blood, it can lead to a condition called haemolytic disease of the newborn (HDN). Finally, knowing your blood type can help others in times of blood shortage as some blood types are rarer than others.
There are eight main blood groups: A+, A-, O+, O-, B+, B-, AB+, and AB-. Blood types are classified based on the presence or absence of certain antibodies in the blood plasma and antigens on the surface of red blood cells.
More than a third of Australians have O+ blood type.
The rarest blood type in Australia is O-, with fewer than 1 in 14 Australians having this blood type. However, it can be given to anyone, making it a universal donor.
