2 ms·
Where I'm from, it's done at birth, it's just a standard part of a medical registration package thing your parents get. My parents kept my bloodtype card right
by henrikschroder 7y ago
Where I'm from, it's done at birth, it's just a standard part of a medical registration package thing your parents get. My parents kept my bloodtype card right next to my childhood vaccination records.
It's not like your bloodtype changes over time...
- viraptor 7y agoIt can actually change in some cases. Liver transplants and bone marrow donations can trigger a change. Apparently kids a few weeks old can flip on their own as well.