1 year ago
Last edited at 1:42PM on 1/19/2013
YOU can't work out your own blood type. A sample has to be drawn and then mixed with other known blood types to determine your compatibilities. This is done by a Hematologist in a laboratory set up to do such complex procedures.... Your family blood types are useful guides, but only a personal analysis will be sure. You need to know in case of accident - tattooing your blood type on your chest or arm is a wise provision, especially if you have a rare blood type.
You need to have your blood typed in order to really know. Ask your dr. he may know from his records, It's usually not typed on a routine basis. But as shoeler96 said, The blood banks must do it, when you give blood.