Natalie and Josh Strong filed a medical-negligence lawsuit on Sept. 17 alleging Brown Fertility Clinic in Jacksonville used another man’s sperm during their IVF cycle. Routine newborn bloodwork after a spring 2025 birth showed the infant was B-positive, inconsistent with the parents’ O-negative and A-negative blood types; a DNA test later indicated Josh is not the child’s biological father. The couple says the clinic has offered no explanation and their attorneys say they seek accountability and answers to protect other families.
Florida Couple Alleges IVF Mix-Up, Sues Clinic After DNA Test Shows Husband Is Not Biological Father
Joshua and Natalie StrongCredit: ABC News/YouTube
Natalie and Josh Strong of Florida have filed a medical-negligence lawsuit alleging that Brown Fertility Clinic in Jacksonville used another man’s sperm in the in vitro fertilization (IVF) cycle that resulted in their daughter. The couple filed the complaint in Duval County on Sept. 17, according to public court records and statements made at a press conference announcing the suit.
The Strongs say their concerns began after routine newborn bloodwork following a spring 2025 birth showed the infant was B-positive — a result they contend is not genetically possible given Natalie's reported O-negative blood type and Josh’s reported A-negative blood type. Because Josh works in health care, the couple said he immediately flagged the inconsistency and the family repeated blood typing for themselves and their child.
After re-testing confirmed the parents’ blood types, the couple ordered a DNA test. That test, the complaint says, indicated Josh is not the child’s biological father. The Strongs allege the clinic has not provided an explanation for the discrepancy.
Brown Fertility Clinic in Jacksonville, Fla.Credit: Google Maps
"This took away the euphoria of having a baby," Natalie told local reporters at the time of the filing, describing the discovery as devastating for the family. Josh said the couple is navigating a mix of grief, anger and love as they continue to raise their daughter.
Attorneys Benjamin Ikuta and Rob Marcereau of the Fertility Law Group represent the Strongs. In a statement reported by PEOPLE, Ikuta described alleged harms including the loss of the biological parenthood Josh pursued through medical procedure and payment, and Natalie’s carrying a pregnancy created with an unknown man’s genetic material without her informed consent. The attorneys say the suit seeks accountability and answers that could help protect other patients.
Brown Fertility Clinic did not immediately respond to media requests for comment, according to reporting. The suit names the clinic and multiple staff members and is proceeding in Duval County civil court. The case raises broader questions about laboratory safeguards, patient consent and transparency at fertility clinics — issues the Strongs say they hope the litigation will address.
The legal process is ongoing, and the claims in the complaint are allegations that have not been proven in court.
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