A mother got a shocking surprise when a DNA test revealed her son had nine half-siblings, all of whom were genetically connected to her former gynecologist.

Mary Ellen Lukezich sought fertility treatments from Dr. Frederick Dettmann in the early 1980s with her late husband, Thomas Laedtke, after the couple had trouble conceiving a child of their own, ultimately deciding to undergo artificial insemination.

Lukezich recalled Dettmann suggested using a medical student’s donated sperm, owing to the fact that he lived out of state and matched her and her husband’s appearance, according to NBC News.

“I was young,” said Lukezich, who is suing the doc…

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