Legal Framework and Considerations
- AI: Recognized by Statute
- NI: Not Recognized
- Sperm donor agreement: Unknown — no clear public safe harbor
Official excerpt — Colo. Rev. Stat. § 19-4-106(2): “A donor is not a parent of a child conceived by means of an assisted reproductive procedure, except as provided in subsection (3) of this section.” Source: official host. § 19-4-106(9): section does not apply to conception by sexual intercourse. CRS 2023 title 19 PDF / G.A. site. July 2026.
Case excerpt — In re Interest of R.C., 775 P.2d 27 (Colo. 1989) (Colorado Supreme Court; en banc): Known donor provided semen for AI of an unmarried woman (delivered to her gynecologist). Question: whether § 19-4-106(2) “precludes a sperm donor from asserting his parental status concerning a child conceived with an unmarried woman through artificial insemination.” Holding: “section 19-4-106 does not apply when the known semen donor and the unmarried recipient agreed that the known donor would have parental rights and expressly agreed at the time of insemination that he would be treated as the natural father of any child so conceived.” If no such agreement, the statute extinguishes the donor’s parental rights; if such an agreement existed, the statute does not extinguish them and the court must determine paternity. Summary judgment for the mother reversed; remanded for fact-finding. Leading Colorado Supreme Court known-donor AI opinion. Modern § 19-4-106 text remains donor-protective by default—document intent (or non-parent intent) carefully. July 2026.
In Colorado, informal sperm donation, including at-home artificial insemination (AI), is governed by the Colorado Revised Statutes (C.R.S.) Title 19, Article 4, specifically C.R.S. § 19-4-106, part of the Uniform Parentage Act adapted in Colorado. This statute outlines parentage rules for assisted reproduction, defined broadly in related laws like C.R.S. § 19-4.5-103(2) as "a method of causing pregnancy through means other than sexual intercourse." No physician oversight is required, making at-home AI a legally recognized option when intent and consent are clear. Modeled on the 2002 Uniform Parentage Act (UPA), it prioritizes donor exemptions without procedural mandates. No substantive changes as of October 2025.
Core Provisions
| Provision | Statute | Key Implications |
|---|---|---|
| Assisted Reproduction | § 19-4.5-103(2) & § 19-4-106 | Defines as methods causing pregnancy other than sexual intercourse, including intrauterine/intracervical insemination, gamete/embryo donation, IVF, and intracytoplasmic sperm injection. Broadly encompasses at-home AI; no physician required. |
| Donor Non-Parentage | § 19-4-106(2) | Donors have no parental rights or duties for children conceived via assisted reproduction. Applies to informal AI; genetic tests inadmissible to establish donor parentage (§ 19-4-106(6.5)). |
| Intent-Based Parentage | § 19-4-106(1) & § 19-4-105 | Signed consent record establishes intended parents (e.g., non-birthing partner). Presumptions for spouses; unmarried may need acknowledgment or judgment. Donors excluded by default. |
| Custody & Child Support | Title 14, Article 10 (Custody) & Title 14, Article 10 (Support) | Non-parents (donors) owe no support; custody defaults to birth/intended parents. Disputes resolved via intent evidence and best interests, not biology alone. |
| Withdrawal/Disputes & Surrogacy | § 19-4.5-201 et seq. (Parentage) & § 19-4.5-301 et seq. (Surrogacy) | Consent withdrawable pre-embryo transfer; post-birth disputes via adjudication (§ 19-4-109). Surrogacy requires validated agreements; informal donation under broader UPA. Cross-state via UIFSA. |
Key court cases
- In re Interest of R.C., 775 P.2d 27 (Colo. 1989) — Ruling (Colorado Supreme Court): Section 19-4-106 does not automatically wipe out a known semen provider’s parental rights when he and the unmarried recipient expressly agreed at insemination that he would be treated as the natural father. If that agreement is disputed, the trial court must take evidence—summary judgment for the mother was reversed. If there was no such agreement, the statute extinguishes the provider’s parental rights/duties.
Bottom line: Default Colorado rule is donor non-parentage for assisted reproduction—but a pre-insemination agreement that the known provider will be a parent takes the case outside automatic non-parentage. Document non-parent (or parent) intent in writing. Reviewed July 2026.
Practical Steps & Risks
- Documentation: Intended parents and donor should sign a pre-conception agreement clarifying non-parental intent (§ 19-4-106(2)). Not mandatory for exemption but crucial evidentiary tool; can also establish intended parent rights (§ 19-4-106(1)).
- Health Screens: Obtain private STI and genetic carrier tests; no state mandate for informal arrangements, but essential to mitigate risks, especially in rural areas.
- Non-Bio Parent Rights: For couples, use signed consent to assisted reproduction (§ 19-4-106(1)) or voluntary acknowledgment (§ 19-4-109) post-birth to secure the non-birthing parent's rights and reinforce donor exclusion—simpler/cheaper than adoption (§ 19-5-203). Married spouses get automatic presumption (§ 19-4-105).
- Risks: Natural insemination (NI) not protected—biology presumes paternity. Undocumented AI vulnerable if intent challenged or donor later acts as parent; out-of-state moves may invoke UIFSA. Colorado's progressive stance favors exemptions with documentation.
- Consult: Contact the Colorado Bar Association's Lawyer Referral Service for family law experts: Find a Lawyer (303-860-1115).