Relating to a court order for retroactive child support, including for retroactive child support beginning on the date of the child's conception.

HB 175 amends Texas Family Code to establish that courts must presume ordering retroactive child support from a child's conception date (determined by medical evidence or parental testimony) is reasonable and in the child's best interest. It requires courts to calculate retroactive support beginning at conception and allows additional orders for prenatal/postnatal medical expenses paid by the obligor. The bill applies only to new court orders or paternity acknowledgments issued after the law takes effect (91 days post-session), not past cases. It does not change existing support obligations but sets new standards for future retroactive calculations.