Okla. Stat. tit. 10, § 7800
Except as otherwise provided by law, the mother of a child born out of wedlock has custody of the child until determined otherwise by a court of competent jurisdiction.
Laws 2010, HB 1964, c. 358, § 1, emerg. eff. June 7, 2010; Amended by Laws 2011, HB 1606, c. 51, § 1, eff. November 1, 2011 (superseded document available).