But Kelli Rowlette, a woman from Iowa, says it led to a stunning discovery about her biological father.
After the DNA test, Kelli Rowlette realised that the doctor had used his own sperm to impregnate her mother when she used artificial insemination in the 1980s.
Court documents show Rowlette learned who Mortimer was after her parents told her about the procedure and Mortimer's role as her mother's obstetrician.
According to the lawsuit, Ashby and Fowler agreed to do the operation but only if the donor had physical characteristics similar to Fowler - brown hair, blue eyes and over 6 feet tall.
Dr Mortimer allegedly told the couple he had used a mixture of Fowler's sperm and a semen donation from their chosen college student donor to help her fall pregnant. She had no idea who Mortimer was, nor did she know her parents had used a medical procedure to help them conceive.
The complaint claims: "Dr Mortimer fraudulently and knowingly concealed his use of his own genetic material in the procedure".
"Dr. Mortimer knew Kelli Rowlette was his biological daughter but did not disclose this to Ms. Ashby or Mr. Fowler", according to the lawsuit outlined in the New York Post.
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A DNA test revealed a woman might be the biological daughter of the doctor who delivered her.
In October 2017, Rowlette discovered her birth certificate while helping her father clean out old papers at his home, and was horrified to discover Dr. Mortimer's signature on the birth certificate. "Mr. Fowler was also devastated", the lawsuit says.
The lawsuit states that when the family announced their plan to move to Washington - nearly 3,000 miles away - Dr Mortimer "cried". "We are committed to delivering the most accurate results, however with this, people may learn of unexpected connections".
But several months later, Rowlette discovered the shocking truth on her own.
The results revealed Dr Mortimer was a DNA match. "Ancestry.com predicted a parent-child relationship between Dr. Mortimer and Mrs. Rowlette".
Now Rowlette takes legal action against gynecologist Gerald Mortimer, accusing him, among other things, of fraud, medical negligence, mental suffering and non-compliance with contract terms.
Right Now looked further into the background of Dr. Gerald Mortimer, the fertility doctor who intentionally insemenated a patient without her knowledge. "With Ancestry, customers maintain ownership and control over their DNA data".
The lawsuit states they "painfully labored" over whether to tell Rowlette.
Idaho Falls attorney Michael Wheiler had just been given the lawsuit Tuesday afternoon, and said he could not a provide a detailed comment until he was more familiar with the case.