DNA Confirms Father Not Biological Despite Shared Blood Types

Natalie and Joshua Strong wanted a baby so badly that they turned to in vitro fertilization at Brown Fertility Associates in Jacksonville. Natalie, 36, and her husband, Joshua, 53, endured two rounds of treatment before bringing their daughter into the world last year. They thought the worst was over until a routine blood test on the newborn revealed something impossible: the baby has B-positive blood.

Under normal circumstances, that result should have been clear proof that Natalie is not the mother or Joshua is not the father. But in this specific tragedy, DNA testing confirmed otherwise. The report stated clearly that Natalie is the biological mother of the girl she carried and delivered, yet Joshua is not the biological father. It was a blow no family could absorb easily.

Joshua has O Negative blood type, as does his wife Natalie, who carries A Negative blood. Neither parent possesses the B antigen required to produce a child with positive blood. The couple realized immediately that something went wrong between the freezer and the petri dish. Their lawsuit alleges Brown Fertility used the wrong sperm to create their embryos.

"It took away the euphoria of having a baby," Natalie told reporters after learning the truth. "I mean, this is going to affect us for the rest of our lives." Joshua described the daily struggle as a mix of sadness and anger that sits right next to moments of joy and love. The couple paid tens of thousands of dollars for biological children together.

Joshua had already undergone a vasectomy years ago, meaning he needed invasive surgery to retrieve sperm specifically for this IVF process. That precious sample was substituted with the sperm of an unidentified man at the clinic before it ever reached Natalie's body. They created seven embryos in total. After a miscarriage following the first transfer, they successfully carried the second one to term and gave birth on June 5, 2025.

The lawsuit filed against Brown Fertility and Dr Samuel Brown seeks $50,000 in damages. It also demands that the clinic turn over all records regarding Joshua's sperm so investigators can ensure it was not used anywhere else. Their attorney, Rob Marcereau of the Fertility Law Group, explained their goal is simple: hold the doctor accountable and stop other families from facing this nightmare.

"We want to know what happened to his sperm," Natalie said in a statement shared with First Coast News. "We want to make sure it was not used anywhere else." The clinic and Dr Brown have been contacted for comment but had not provided a response at the time of reporting. This case highlights a terrifying reality where medical error can destroy a family's dream before they even get to hold their child.