The blood group of each individual is not the same. Differences in blood type are grouped into types A, B, AB, or O. Blood rhesus (Rh) status is also divided into negative and positive. These differences need to be considered in the use of blood in the medical world.
You may need blood type information for medical reasons, to get an international visa, or just to get to know your body better. You can estimate your blood type based on your parents' blood type, but to be more accurate, you'll need to take a blood type test. If you don't want to see a doctor, you can do it yourself at home using a simple blood test kit.
Using Tables
The first way to find out which blood type you have is to use the help of the blood group estimation table as below.
By reading this table, you can find out which blood type you have based on the combination of blood groups of both parents.
Therefore, you must know the blood type of the father and mother to be able to check your own blood type using this method.
In many cases the blood type only needs to be estimated, using an online blood group calculator or looking at the following list:
How to read an approximate table of a child's blood group based on the blood group of the parents is as follows:
Parent 1 -> O x Parent 2 -> O then child -> O
Parent 1 -> O x Parent 2 -> A then child -> A or O
Parent 1 -> O x Parent 2 -> B then child -> B or O
Parent 1 -> O x Parent 2 -> AB then child -> A or B
Parent 1 -> A x Parent 2 -> A then child -> A or O
Parent 1 -> A x Parent 2 -> B then child -> A, B, AB or O
Parent 1 -> A x Parent 2 -> AB then child -> A, B or AB
Parent 1 -> B x Parent 2 -> B then child -> B or O
Parent 1 -> B x Parent 2 -> AB then child -> A, B or AB
Parent 1 -> AB x Parent 2 -> AB then child -> A, B or AB
Blood type also includes the “Rh factor” (+ or -). If both of your parents have an Rh- blood type (such as O- or AB-), you will also have an Rh-. If one or both of your parents have the Rh+ blood type, you can't tell if your blood type is + or – without going through a blood test.
