When your biological father is your mother's fertility doctor: DNA tests reveal cases of 'fertility fraud'

Bianca Voss reeled in shock when her daughter, Roberta, told her the results of the 23andMe genetic test she took last fall. It indicated that the fertility doctor who had artificially inseminated Voss in 1983, enabling her to give birth to Roberta, had secretly used his own semen.

"I am angry that I was violated in this manner," Voss said during a late May online news conference to announce a federal lawsuit against the doctor, Martin D. Greenberg, who worked in New York City during the 1980s and now lives in Aventura, Florida. "How could I have picked such a criminal and immoral physician who would do such a thing to me?"

Her daughter was angry, too. Roberta Voss had tried to contact Greenberg through his 23andMe account, but it was deleted after she messaged him. "He knew he was caught, and he was trying to cover it up," she said in an interview with USA TODAY.