A married couple was told they were biological twins after they visited an IVF clinic because they were struggling to conceive a child.
The couple, who met in college, had attended the clinic in MS in the hope that it would be able to help them have their own child.
It was only discovered when a lab assistant at the IVF clinic in Jackson, Mississippi, noticed their DNA samples were remarkably similar.
Neither the couple nor doctor can be named for patient confidentiality reasons.
The doctor says he continued to insist that the pair were twins and had DNA evidence to back it up, after which the wife "pleaded" with him to admit he was joking.
He then informed the pair that they were in fact related, but initially they just laughed it off, assuming that the doctor was making a joke, and admitted that some people did note how they did look alike.
He then realized the husband and wife must be biological twins but did not know if they were already aware.
However, the doctor confirmed that he was not joking: "From what we were able to piece together, the biological parents of the couple had died in an auto crash when the couple was infants, and they had no close family willing to adopt them". "The fact that they'd both been adopted after their parents had died, meant they'd both experienced a similar childhood, and they felt they could really connect with each other".
The couple explained they met while at college and bonded over their near-identical backgrounds. "If only they had known the truth, it could have saved them so much pain later on", the doctor told Mississippi Herald.
"For me, it's a particularly unusual case because my job is all about helping couples conceive a child".
Marriage between siblings in MS could lead to a jail term of 10 years, but the man and woman are not likely to be charged due to the unique circumstances.
The pair are now said to be re-considering their future together.