750 ILCS 46/103

(750 ILCS 46/103)

Sec. 103. Definitions. In this Act:

(a) "Acknowledged parent" means a person who has established a parent-child relationship under Article 3.

(b) "Adjudicated parent" means a person who has been adjudicated by a court of competent jurisdiction, or as authorized under Article X of the Illinois Public Aid Code, to be the parent of a child.

(c) "Alleged genetic parent" means a person who alleges to be, or is alleged to be, a genetic parent of a child whose parentage has not been adjudicated. The term does not include:

(1) a presumed parent or acknowledged parent;

(2) a person whose parental rights have been terminated or declared not to exist; or

(3) a donor.

(d) "Assisted reproduction" means a method of achieving a pregnancy through means other than by sexual intercourse, including, but not limited to, all of the following: (1) artificial insemination or intrauterine, intracervical, or vaginal insemination; (2) donation of gametes; (3) donation of embryos; (4) in vitro fertilization and embryo transfer; (5) intracytoplasmic sperm injection; or (6) assisted reproductive technology. "Assisted reproduction" does not include any pregnancy achieved through sexual intercourse.

(e) "Child" means an individual of any age whose parentage may be established under this Act.

(f) "Combined parentage index" means the likelihood of parentage calculated by computing the ratio between:

(1) the likelihood that the tested person is the parent, based on the genetic markers of the tested person, woman or person who gave birth, and child, conditioned on the hypothesis that the tested person is the parent of the child; and

(2) the likelihood that the tested person is not the parent, based on the genetic markers of the tested person, woman or person who gave birth, and child, conditioned on the hypothesis that the tested person is not the parent of the child and that the parent of the child is of the same ethnic or racial group as the tested person.

(g) "Commence" means to file the initial pleading seeking an adjudication of parentage in the circuit court of this State.

(h) "Determination of parentage" means the establishment of the parent-child relationship by the signing of a voluntary acknowledgment under Article 3 of this Act or adjudication by the court or as authorized under Article X of the Illinois Public Aid Code.

(i) "Donor" means a person who provides gametes intended for use in assisted reproduction, whether or not for compensation. "Donor" does not include a person who is a parent under Article 7 or an intended parent under the Gestational Surrogacy Act.

(j) "Ethnic or racial group" means, for purposes of genetic testing, a recognized group that an individual identifies as all or part of the individual's ancestry or that is so identified by other information.

(k) "Gamete" means either a sperm or an egg.

(l) "Genetic testing" means an analysis of genetic markers to exclude or identify a person as the parent of a child as provided in Article 4 of this Act.

(l-5) "Gestational surrogacy" means the process by which a woman or person attempts to carry and give birth to a child created through in vitro fertilization in which the gestational surrogate has made no genetic contribution to any resulting child.

(m) "Gestational surrogate" means a woman or person who is not an intended parent and agrees to engage in a gestational surrogacy arrangement pursuant to the terms of a valid gestational surrogacy arrangement under the Gestational Surrogacy Act.

(m-5) "Intended parent" means a person who consents to assisted reproduction, including a gestational surrogacy agreement, such that the person is a legal parent of the resulting child. "Intended parent" includes, in the case of a married couple, both spouses for all purposes under this Act.

(n) "Parent" means an individual who has established a parent-child relationship under Section 201 of this Act.

(o) "Parent-child relationship" means the legal relationship between a child and a parent of the child.

(p) "Presumed parent" means an individual who, by operation of law under Section 204 of this Act, is recognized as the parent of a child unless that status is rebutted or confirmed in a judicial or administrative proceeding.

(q) "Probability of parentage" means the measure, for the ethnic or racial group to which the alleged genetic parent belongs, of the probability that the person in question is the parent of the child, compared with a random, unrelated person and of the same ethnic or racial group, expressed as a percentage incorporating the combined parentage index and a prior probability.

(r) "Record" means information that is inscribed on a tangible medium or that is stored in an electronic or other medium and is retrievable in perceivable form.

(s) "Signatory" means an individual who authenticates a record and is bound by its terms.

(t) "State" means a state of the United States, the District of Columbia, Puerto Rico, the United States Virgin Islands, or any territory or insular possession subject to the jurisdiction of the United States.

(u) "Substantially similar legal relationship" means a relationship recognized in this State under Section 60 of the Illinois Religious Freedom Protection and Civil Union Act.

(v) "Support-enforcement agency" means a public official or agency authorized to seek:

(1) enforcement of support orders or laws relating to the duty of support;

(2) establishment or modification of child support;

(3) determination of parentage; or

(4) location of child-support obligors and their income and assets.

(Source: P.A. 104-448, eff. 12-12-25.)