Okla. Stat. tit. 10, § 10-7700-204: Presumption of paternity

A. A man is presumed to be the father of a child if:

1. He and the mother of the child are married to each other and

the child is born during the marriage;

2. He and the mother of the child were married to each other

and the child is born within three hundred (300) days after the

marriage is terminated by death, annulment, declaration of

invalidity, dissolution of marriage or after decree of separation;

3. Before the birth of the child, he and the mother of the

child married each other in apparent compliance with law, even if

the attempted marriage is or could be declared invalid, and the

child is born during the invalid marriage or within three hundred

(300) days after its termination by death, annulment, declaration of

invalidity, a decree of separation, or dissolution of marriage;

4. After the birth of the child, he and the mother of the child

married each other in apparent compliance with law, whether or not

the marriage is or could be declared invalid, and he voluntarily

asserted his paternity of the child, and:

a. the assertion is in a record with the State Department

of Health, Division of Vital Records or the Department

of Human Services,

b. he agreed to be and is named as the child’s father on

the child’s birth certificate, or

c. he promised in a record to support the child as his

own; or

5. For the first two (2) years of the child’s life, he resided

in the same household with the child and openly held out the child

as his own.

B. A presumption of paternity established under this section

may be rebutted only by an adjudication under Article 6 of the

Uniform Parentage Act.