Open-ID vs anonymous sperm donor: what the difference means for the child

• Anonymous sperm donation is functionally extinct in 2026. Consumer DNA databases have grown dense enough that a search for a person of European descent returns a third-cousin-or-closer match about 60% of the time, and ordinary genealogical work turns that match into a name, whether or not the donor ever took a test himself.

• Open-ID donation, where the bank releases the donor's identifying information to the donor-conceived child at 18 on request, is available at every major US sperm bank and is now the default at most. It gives the child a structured way to reach that information rather than a discovery left to a genealogy website.

• Choosing between an open-ID bank donor and a donor your child knows from the start is less about the child's eventual access to the donor's identity, which they will have either way, than about the shape of the relationship during childhood.

Why anonymous donation ended

For four decades, anonymous donation was simply how sperm banks worked. A bank gave you a donor profile with medical history, physical characteristics, education, and sometimes a childhood photo, but nothing that identified him, and the donor-conceived person grew up knowing there had been a donor, with no way of finding him.

Three changes, arriving together between 2015 and 2025, ended that model.

1. Consumer DNA testing became universal. Around 30 million people worldwide have taken a direct-to-consumer ancestry test, enough to make distant-cousin matching routine. The donor himself never has to take a test for this to matter: about 60% of long-range familial searches for a person of European descent return a third-cousin-or-closer match, and a database covering only 2% of a population is enough to give nearly everyone in it one (Erlich et al., Science, 2018). None of this is instant, though. Only 15% of searches turn up a second cousin or closer, and the researchers who demonstrated the method described the step after the match, narrowing candidates by hand, as a full working day on top of the weeks a test takes to come back.

2. Donor-conceived people organized. Through groups like We Are Donor Conceived, the US Donor Conceived Council, and their counterparts in other countries, adult donor-conceived people, or DCPs, changed the public understanding of what donor conception means for the child. Their accounts of secrecy and late-life discovery have shifted clinical practice and what intended parents expect.

3. The banks moved, and then a state made it law. Intended parents, informed by the DCP movement and by their own reading of the research, increasingly asked for open-ID donors, and the pool turned over: open-identity donors were 11.9% of US sperm donors in 2006 and 65% in 2024, while the total number of donors barely moved (Valido, Harbour and Scheib, 2025). In Colorado it is no longer a matter of bank practice at all. SB 22-224, codified at C.R.S. Title 25, Article 57, bars a bank from providing gametes from any donor who will not agree to identity disclosure at 18, requires the bank to release that information on request, and caps a single donor at 25 families in or outside the state. The dates matter, though: those duties apply only to gametes collected or matched from January 1, 2025, so the first Colorado disclosure right does not mature until around 2043. Washington is the instructive contrast: there a donor is offered the same declaration and may sign that he does not agree. Colorado forbids that refusal; Washington preserves it.

So in 2026 anonymous donation survives in name only. A child conceived from an "anonymous" donor today will almost certainly be able to find him as an adult through DNA testing, and what a family really chooses is whether that disclosure is structured, through open-ID, or accidental, through a DNA match.

Open-ID: what your child can actually access at 18

Open-ID is a bank term for the most open of the three levels of anonymity a sperm bank sells. A fully anonymous donor is never identifiable to anyone, at any age. An "open" donor stays anonymous, since the bank never releases his identity, but he has agreed to at least one contact with a donor-conceived child who asks for it. An open-ID donor has consented, at the time of donation, to the release of his identifying information to any donor-conceived child who requests it once they turn 18. Labels vary, so check what a given bank means by its own before you buy. At California Cryobank the open-ID tier is called "ID disclosure," and that donor releases his full name, date of birth, and last-known address at 18, while an "Open donor" there has agreed only to one communication and is a cheaper, separate category; other banks run the top tier as an "identity-release" program. That is an expensive distinction to discover eighteen years later.

What "identifying information" typically includes:

• His full name.

• His last known contact information (address, email, or phone).

• Sometimes a photograph, if he supplied one. This is the item families most often assume is included and most often is not. At California Cryobank an adult photo is a separate $30 purchase and exists only for donors who chose to provide one, and The Sperm Bank of California releases photographs only if the donor volunteered them.

• Sometimes additional biographical information he provided (occupation, family life, updated medical history).

What the process looks like:

• At 18 or later, the donor-conceived person contacts the bank that holds the donor's file.

• The bank verifies who is asking and hands over the donor's identifying information.

• The DCP decides what to do next: write to the donor, not write, wait, or something else entirely.

• Whether the donor owes a reply depends on what he signed. Identity-release programs generally release the information without promising contact, and The Sperm Bank of California says plainly that it does not guarantee any. An open donor at California Cryobank or Seattle Sperm Bank, by contrast, has committed to at least one contact but stays anonymous. Ask which of the two you are buying.

What open-ID does NOT mean:

• It does not create any legal relationship between the donor and the DCP.

• It does not obligate the donor to be in contact, to answer messages, or to meet.

• It gives the DCP no parental-rights claim on the donor, and the donor none on the DCP.

• It does not obligate the DCP to reach out, either. Many never do.

Research on outcomes: the finding that holds up is about timing, and it is worth stating precisely. In families followed from the child's first year to age 20, the young adults were as well adjusted as an unassisted-conception comparison group, with no significant difference by family type (Golombok et al., 2023). Age 7 is the study's own dividing line: at 14, the adolescents who had been told before 7 reported more positive family relationships and higher well-being than those told later (Ilioi et al., 2017). At 20 the significant disclosure effects were on the mothers, who showed lower anxiety, lower depression, and less negative parenting if they had told by 7, while the young adults' own measures pointed the same way without reaching significance. What none of this tested was eventual contact with the donor. The one longitudinal study that did test it found that donor type and contact had no significant effect on behavioral outcomes (Carone et al., 2025).

Known from the start: pros and cons

The alternative to any bank tier is a donor the family knows from the start: a private known donor, someone already in your life, or an agreement-only donor you matched with through a platform and got to know before conception. Either way the intended parents know exactly who he is, and the child can know too, in age-appropriate ways, from the beginning; with a platform match, when the child learns his identity is one of the clauses you write. How much of a presence he becomes varies a great deal:

No contact between donor and child. Legally much like open-ID, except that the family knows who the donor is and the child has no formal relationship with him. The child grows up knowing who he is, and contact can begin whenever the child asks for it rather than waiting for 18.

Occasional contact. Photo updates, a meeting now and then, a presence at some milestones. The donor is a known figure in the child's life, but not a parenting one.

Regular contact, the "cool family friend" model. The donor is a periodic presence, comes to specific events like birthdays and graduations, and has an ongoing relationship without being a parent. It is the closest structure to co-parenting without actually co-parenting.

Pros of knowing the donor from the start:

• The parents have full information about the donor's personality, character, and family at the moment they decide.

• The child grows up with the donor as a person rather than a concept.

• Health updates can happen naturally over the child's life.

• There is no "wait until 18," which some families find hard.

Cons:

• Legal exposure: what protects the donor is your state's statute, and what satisfies it varies. California and New York both accept a written record signed before conception with no clinic involved; some states have no donor statute at all. A clinic helps where the statute makes it the trigger, and is no substitute for the paperwork where it doesn't.

• Relationship management: the donor's family, spouse, and other children may form their own opinions about their relationship to your child.

• Boundaries: "cool family friend" is a specific arrangement, and it takes ongoing negotiation to keep it one.

• No way back: once the child knows the donor as a person, that cannot be undone.

Neither open-ID nor known-from-the-start is objectively better. They are different family structures with different trade-offs.

For the fuller comparison of all three routes, see How to find a sperm donor: bank, known donor, or a platform match.

How to talk with a donor about openness before you sign

Whether you matched with an agreement-only donor on a platform or are asking a known donor from your own community, the openness conversation happens before anyone signs anything. Questions worth asking:

On disclosure to the child:

• Are you comfortable with the child knowing who you are, whether right away or at 18?

• If the child reaches out as an adult, would you be willing to answer their questions?

• How would you feel about the family keeping a photograph of you and showing it to the child?

On future contact:

• If the child reached out at 18, would you want to meet? How do you picture that going?

• If the intended parents wanted to send you a photo on the child's first birthday, would that be welcome?

• If your own life changed, say you married or had children, would you want to update the intended parents on your contact preferences?

On the donor's family:

• Have you told your parents, siblings, or spouse about the donation? Are they supportive?

• If the child eventually met you, would your family be part of the child's circle, or kept separate?

On the practical logistics of ongoing contact:

• Ten years from now, what is the best way for the intended parents to reach you: direct email, through the platform, or through a mediator?

• If your contact information changes, will you update it?

These conversations are never one and done; they keep evolving for as long as the arrangement does. But the first ones tell you a great deal about how it will feel over decades.

What to tell the child, at what age

Telling the child is a separate question from openness with the donor. Even when the donor is anonymous, or the agreement rules out any contact with him, the intended parents can tell the child they were donor-conceived from an early age, and the research consensus that they should is strong.

The current best-evidence recommendation:

• Start early, in language the child can follow. ASRM points to the preschool and school-age years, before puberty, and Britain's HFEA says early childhood; neither names an age, and ASRM says outright that no research identifies an ideal one. The "seed story" is the usual first version: you were made from Mommy's egg and a nice man's seed, because Mommy wanted a baby.

• The child grows up with donor conception as part of their story, and there is never a "big reveal."

• Details get added as the child is ready for them: the basic biology once they start asking how bodies work, a more nuanced conversation in adolescence. That pacing is our editorial judgment rather than the recommendation of any professional body; the nearest thing to a rationale is the same longitudinal team's observation that children only begin to develop a biological concept of family around age 7.

• With an open-ID donor, the option of learning his identity later is introduced in adolescence, so the child knows the choice is theirs.

What the research says about late disclosure: people who find out as adults report more negative feelings about their conception than those told early, and when the discovery comes out of a DNA test, it is documented as rupturing family relationships, particularly with the mother. Three caveats belong with that. Feelings toward the parents specifically are mixed in the donor-conception research rather than uniformly negative. Nearly every sample is recruited through registries or support communities, which selects for people who found it hard. And ASRM itself writes that research "has not consistently found an association between the age of disclosure and family or offspring functioning." The case for telling early rests on the longitudinal age-of-disclosure findings, not on any claim that late discovery always does harm.

Why early disclosure works: a child who grows up with donor conception as ordinary, integrated background information never experiences it as a shocking revelation. It has been part of who they are from the beginning.

Telling your donor-conceived child their story is a bigger conversation than one section can hold, and the age-by-age guidance above is the place to start it.

The legal difference is smaller than you think

In practice, the legal difference between anonymous, open-ID, and known donors is smaller than intended parents tend to assume:

• In most US states, a statute says that a donor is not a legal parent and owes no support, and it says so whether he is anonymous, open-ID, or known. What each statute requires differs, and that difference is the whole game. There are two families of them. The modern ones, which follow the 2002 and 2017 Uniform Parentage Acts, usually attach no conditions; Washington's RCW 26.26A.605 is the clean case. Not all of them are that clean: Texas calls its chapter the Uniform Parentage Act (Family Code § 160.101) but defines a donor as someone who provides sperm "to a licensed physician" (§ 160.102(6)), so a man who hands his sperm straight to the recipient for insemination at home is not a donor under it. The older ones, descended from the 1973 Act, protect the donor only where a licensed physician performed the insemination, and a couple of them go further still and speak only of insemination for a married woman, which on its face leaves an unmarried recipient's donor unprotected. Missouri's § 210.824.2 and Alabama's § 26-17-702 are the two we found, and the Alabama text should be checked against the current code before anyone relies on it. Worse than either are the states whose statutes never mention the donor at all and only legitimate the consenting husband's child, so that the donor's position is simply unaddressed. California and New York sit at the other end. California accepts a written agreement signed before conception where no physician or sperm bank was involved (Fam. Code § 7613(b)(2)); New York accepts a record of donative intent signed before a notary public, before two witnesses who are not the intended parents, or before a health care practitioner (Fam. Ct. Act §§ 581-302 and 581-202(d)). Some states have no donor statute at all, and nobody has published a reliable count of how many, so the only useful answer is to check your own. Nor is a clinic a shield against everything. California's courts have held that § 7613(b) stops a sperm donor from claiming paternity from the biological link alone, but not from proving he became a presumed parent through his conduct after the birth (Jason P. v. Danielle S., 226 Cal.App.4th 167 (2014), with parentage later affirmed at 9 Cal.App.5th 1000 (2017)), in a case where the sperm had gone through a licensed clinic. What protects everyone is the combination: a statute you actually complied with, a written agreement executed the way that statute requires, and, for a known donor, a court judgment confirming parentage where your state offers one.

• Open-ID gives the donor no legal rights or obligations toward the DCP. It means only that identifying information is available.

• Known and platform-matched donors get the same statutory parentage protection once the state's conditions are met, whatever those conditions are. What a donor you know has, and an anonymous donor does not, is a practical opening to claim parentage based on his conduct after the birth. That is why the written agreement matters most here.

The sharpest legal fork is not "clinic versus home insemination" but whether your state has a donor statute and whether your paperwork satisfies it. "Known versus unknown" is a legal fork of its own, not just a relationship choice. For the specific structure of that paperwork, see Known sperm donor agreement: the 8 clauses that decide everything.

Next step

If you are weighing anonymous, open-ID, and known-from-the-start arrangements, this is the practical order:

1. Read donor-conceived people's own accounts. We Are Donor Conceived, the US Donor Conceived Council, and various podcasts carry first-person perspectives that clinical and agency materials leave out.

2. Talk with your partner (or, for solo parents by choice, with a therapist who works with donor conception) about the relationship you want your child to have with the donor's information.

3. Choose on the basis of the family structure you want, not on cost or convenience.

4. If you choose an anonymous donor, understand that DNA testing means your child will very likely be able to identify him as an adult anyway, just without the structure open-ID provides. Plan the disclosure accordingly.

To see sperm donor profiles, from donors offering open identity at 18 to those open to an ongoing relationship, browse donor profiles on To Be Parents. For the three routes side by side, see How to find a sperm donor: bank, known donor, or a platform match; for telling your donor-conceived child their story, start with the age-by-age guidance above.

This article is educational, not medical, legal, or psychological advice. Donor conception has significant psychological, legal, and ethical dimensions that deserve individualized professional guidance. Consult a reproductive endocrinologist, a family-formation attorney, and (if helpful) a mental health professional who specializes in donor conception before making decisions.