Mo. Rev. Stat. § 210.819: Parent and child relationship, how established.

The parent and child relationship between child and:

(1) The natural mother may be established by proof of her having given birth to the child, or under the provisions of sections 210.817 to 210.852;

(2) The natural father may be established under the provisions of sections 210.817 to 210.852;

(3) An adoptive parent may be established by proof of adoption.