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![Rh Factor - American Pregnancy Association](https://www.iarticlesnet.com/pub/img/site/s_28.jpeg)
Rh Factor - American Pregnancy Association
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日期:2024-08-25
If your blood lacks the Rh antigen, it is called Rh-negative. If it has the antigen, it is called Rh-positive. ... Each person’s blood is one of four major types: A, B, AB, or O. Blood types are determined by the types of antigens on the blood cells....看更多