Utah Code § 81-5-201: Establishment of parent-child relationship.

(1)

(a) The mother-child relationship is established between a woman and a child by:

(i) the woman's having given birth to the child, except as otherwise provided in Part 8, Gestational Agreement;

(ii) an adjudication of the woman's maternity;

(iii) adoption of the child by the woman;

(iv) an adjudication confirming the woman as a parent of a child born to a gestational mother if the agreement was validated under Part 8, Gestational Agreement, or is enforceable under other law; or

(v) an unrebutted presumption of maternity of the child established in the same manner as under Section 81-5-204.

(b) In this chapter, the presumption of maternity shall be treated the same as a presumption of paternity as established in Subsection (2)(a).

(2) The father-child relationship is established between a man and a child by:

(a) an unrebutted presumption of the man's paternity of the child under Section 81-5-204;

(b) an effective declaration of paternity by the man under Part 3, Voluntary Declaration of Paternity, unless the declaration has been rescinded or successfully challenged;

(c) an adjudication of the man's paternity;

(d) adoption of the child by the man;

(e) the man having consented to assisted reproduction by a woman under Part 7, Assisted Reproduction, which resulted in the birth of the child; or

(f) an adjudication confirming the man as a parent of a child born to a gestational mother if the agreement was validated under Part 8, Gestational Agreement, or is enforceable under other law.