When Karen, a middle aged mother of three living outside Boston, heard she needed a kidney urgently, her two eldest sons and her husband went to have DNA tests done.
But then what should have been a routine procedure ended up leading to a remarkable story.
The boys were not a match to their mother’s DNA!
They matched the dad, but the tests showed Karen was not their mom, even though she gave birth to them.
This was a first for doctors and they decided to take samples not only from her blood, but also from her thyroid, saliva, skin, hair, urine and internal organs.
The findings blew everybody away. Karen has two sets of DNA. She is two people. But how?
Karen's mother was pregnant with twin girls, and within the first four days of the pregnancy, the two embryos fused into one unit. The twins did not blend into one person – they just claimed different parts.
One twin claimed the blood and the other claimed the thyroid, and so on, but they each have their own unique DNA. So Karen is actually a plural, or what is referred to as a Chimera. If it happened after four days, she would have been a Siamese twin.
One of the twins therefore gave birth to the two boys, but it was not the twin who ‘claimed’ the blood.