Joshua and Natalie Strong turned to Brown Fertility in Jacksonville after Joshua underwent surgery to retrieve sperm for IVF, producing four vials intended to help them have a biological child. After Natalie gave birth in June 2025, however, blood typing and a DNA test indicated Joshua was not the baby's biological father, according to their lawsuit. The Florida couple now allege in a lawsuit filed Thursday in Duval County Circuit Court that the fertility clinic used the wrong sperm.