There are 4 main blood groups (phenotypes): A, B, AB and O. There are some also some rare blood types that fall outside of the major groups e.g. U- RzRz, Jk, Di Kp(b-), etc. In addition to the blood groups, another consideration is the Rhesus Factor (Rh) which can be positive or negative. In most cases, blood type does not matter, but being educated in advance is always useful.
Understanding Blood Types
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Although blood type is something we all take for granted, many of us know very little about the complexities of this precious fluid. In particular, understanding its role in Third Party Reproduction can be even more critical, so it pays to educate yourself in advance of your journey.
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