A Florida couple has sued a fertility clinic after a DNA test allegedly showed that the husband had a zero per cent probability of being the biological father of their long-awaited baby girl.
Natalie and Joshua Strong said they spent years undergoing injections, hormone treatments and other medications, while also dealing with the emotional pain of a failed IVF attempt, before finally welcoming their daughter in 2025.
However, their happiness reportedly turned to devastation shortly after the baby’s birth when routine blood work raised questions about her biological parentage. A subsequent DNA test allegedly confirmed that Joshua was not the child’s biological father.
The couple claims Brown Fertility in Jacksonville, Florida, mistakenly used another man’s sperm to create the embryo that resulted in their daughter. The fertility clinic has denied the allegation, according to reports.
“I just don’t understand how one little mistake like that could affect our whole lives forever,” Natalie told CBS News.
Despite the discovery, Natalie said her love for her daughter had not changed.
“I was so happy I had her and I love her more than anything in the world,” she said. “But to hear that right after you have your baby is devastating.”
The Strongs are now suing Brown Fertility and its lead physician, Dr Samuel Brown, seeking answers about their daughter’s biological father and what happened to Joshua’s sperm.
The couple said they still have three embryos in storage but do not know whose sperm was used to create them.
Joshua also fears his sperm may have been mistakenly used in another patient’s treatment.
“We have no idea if they still have it, if they’ve used it elsewhere,” he told CNN. “If there are other potential children somewhere, we have no idea.”
The couple began their IVF journey in 2023 after deciding they wanted to have a biological child together. Their first attempt failed before a subsequent round eventually resulted in the birth of their daughter.
“We finally got our beautiful baby girl, and it was the best day of my life,” Natalie said.

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