Del. Code Ann. tit. 13, § 8-621
(a) Except as otherwise provided in subsection (c) of this section, a record of a genetic testing expert is admissible as evidence of the truth of the facts asserted in the report unless a party objects to its admission within 14 days after its receipt by the objecting party and cites specific grounds for exclusion. The admissibility of the report is not affected by whether the testing was performed:
(c) If a child has a presumed, acknowledged or adjudicated father, the results of genetic testing are inadmissible to adjudicate parentage unless performed:
(d) Copies of bills for genetic testing and for prenatal and postnatal health care for the mother and child which are furnished to the adverse party not less than 10 days before the date of a hearing are admissible to establish: