Hello, I have an interesting question. I am 20 years old and just learned that my mother had a complicated pregnancy with me when I was young. Apparently, she had some sort of Cal (Kal) factor in her blood that complicated the pregnancy in a similar way as rH incompatibility does. She also noted that the condition was somewhat rare. So my question is what is a Cal Factor and how did it complicate the pregnancy. I'm just very curious about the story of how I was born. Thank you,

-Ty

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