Okla. Stat. tit. 43, § 43-110.2: Blood, saliva, urine or any other tests – Child custody

or visitation.

In any action in which the custody of or the visitation with a

child is a relevant fact and at issue, the court may order the

mother, the child or father to submit to blood, saliva, urine or any

other test deemed necessary by the court in determining that the

custody of or visitation with the child will be in the best

interests of the child. If so ordered and any party or child

refuses to submit to such tests, the court may enforce its order if

the rights of others and the interests of justice so require unless

such individual is found to have good cause for refusing to

cooperate.