The sentence that does the work
On a page titled “Family Limits: Your Options Explained,” Seattle Sperm Bank writes: “Our standard operating procedure limits us to a maximum of 25 families per sperm donor in the entire United States.”
Read it twice. The number is 25. The noun is families, not children, not pregnancies, not vials. The authority behind it is a standard operating procedure — the bank’s own internal document, written by the bank, for the bank. Not a statute. Not a regulation. Not a court order. A procedure.
That sentence is the artifact this post is about. Not because 25 is scandalous, and not because it is generous. Because of what the grammar reveals: a limit that exists only in the voice of the entity that benefits from it, counted by a method the same page describes in two different ways, and verified — in the bank’s own words — by the recipients themselves.
What the federal rule actually covers
It is worth being precise here, because “sperm banks are unregulated” is a common shorthand and it is wrong. Sperm banks are regulated. They are just not regulated for this.
21 CFR Part 1271, Subpart C governs donor eligibility. Section 1271.45(b) requires “a donor-eligibility determination, based on donor screening and testing for relevant communicable disease agents and diseases” for “all donors of cells or tissue used in HCT/Ps,” with limited exceptions under § 1271.90. Section 1271.50(a) specifies that a “responsible person” must “determine and document the eligibility of a cell or tissue donor,” and § 1271.50(b) defines eligibility entirely in terms of infectious disease: the donor must be free from risk factors for and clinical evidence of relevant communicable disease agents, and testing must be negative or nonreactive.
That is the scope. HIV, hepatitis B and C, HTLV, syphilis, Creutzfeldt-Jakob disease, xenotransplantation risk. The regulation is a communicable-disease screening rule. It says nothing about how many families may receive vials from one donor, because family count is not a communicable disease risk. The 25-family figure does not come from 21 CFR 1271. It cannot, because 21 CFR 1271 is not about that.
This matters for a practical reason. When a bank says its donor program is “FDA compliant,” that statement is true and irrelevant to the family limit. FDA compliance certifies the infectious-disease paperwork. It does not certify the count. A family reading a donor profile and seeing the federal compliance language may reasonably assume the number beside it has the same backing. It does not.
The professional society is also silent on the number
The American Society for Reproductive Medicine publishes guidance on gamete and embryo donation. The 2024 document describes itself as summarizing “the current guidance for donor eligibility determination, which is mandated by the FDA before the use of donor oocytes, donor sperm, or donor embryos.” It goes further than the FDA on some fronts — the document notes that “although the FDA donor eligibility determination focuses on infectious risk, the ASRM guidance also incorporates prenatal optimization, psychoeducational counseling of donors and recipients, and genetic risk assessment.”
It covers quarantine periods, directed versus nondirected donation, genetic screening, psychological evaluation, and the labeling of ineligible tissue for directed use. What the retrieved text does not do is set a maximum number of families or offspring per sperm donor. The society that advises the clinics has guidance on screening and counseling; the number is not in it.
So the layers stack like this: the federal rule covers infectious disease. The professional society covers screening, counseling, and genetics. The family limit is left to the bank. That is not a loophole in the sense of something slipped through; it is simply a topic no one above the bank has claimed.
Two counting methods on one page
Here is where the Seattle Sperm Bank page becomes more interesting than a marketing number. It describes how the limit is tracked, and it describes two different methods.
For standard anonymous donors: “Family limits for these donors are closely monitored and confirmed through pregnancy and birth reporting from recipient parents.”
For donors with family slots: “Except in the case of donors with family slots, where limits are tracked through the purchase of vials instead of pregnancy and birth reporting.”
Those are not the same measurement. Pregnancy and birth reporting counts outcomes — a pregnancy, a live birth — as reported by the people who used the vials. Vial-purchase tracking counts units sold. A family that buys four vials and achieves one live birth counts as one family under the first method and four vials under the second. A family that buys vials and never reports a pregnancy is, under the first method, invisible to the count until they speak up. Under the second method, they were counted at checkout.
Neither method is dishonest on its face. Both are reasonable ways to run a small operation. But they answer different questions, and the page presents them as if they were the same policy applied to different donor types. A prospective parent choosing between a standard donor and a family-slot donor is choosing between two counting systems, and the page does not say which system produces the number they are relying on.
Who reports, and what the page does not say
The phrase “confirmed through pregnancy and birth reporting from recipient parents” deserves its own paragraph, because it locates the verification burden outside the bank.
The page describes no clinic follow-up or birth-record cross-referencing; it describes confirmation “through pregnancy and birth reporting from recipient parents.” That is a disclosure practice, not an audit. It works if parents report, and it produces a number that is only as complete as the reporting rate. A parent who moves, changes email, or simply does not think to notify a sperm bank after a birth is not counted. A bank that has sold vials to 25 families and received reports from 18 has a count of 18 and a policy of 25, and both statements can be true at once.
This is not an accusation of bad faith. It is a description of the mechanism, drawn from the bank’s own sentence. The mechanism is voluntary reporting. Voluntary reporting is how most small-scale tissue tracking works, and it is also why the number should be read as a target the bank manages toward rather than a ceiling it can prove it has not crossed.
The industry-wide claim, and what backs it
The same page states: “This family limit policy is consistent with practices observed across sperm banks nationwide.”
That is the bank’s assertion. It may well be accurate — 25 is a commonly cited figure in U.S. donor conception, and other banks publish similar numbers. But the sentence as written is not an audit, a survey, or a citation. It is a claim about what other banks do, made by one bank, on its own marketing page, without a named source. A reader should treat it as a statement of the bank’s understanding of its field, not as an industry-wide finding.
This is the kind of claim the archive exists to test. If a second bank publishes a different number, or the same number with a different counting method, the “consistent with practices” sentence becomes a data point rather than a fact. Until then, it is one bank describing its neighborhood.
What a family can actually ask for
The practical takeaway is not “demand a lower limit.” The limit is not the lever. The lever is the paperwork behind it.
If you are choosing a donor and the family limit matters to you — and for many queer and non-traditional families building through donor conception, it does, because sibling groups and donor-conceived community are real relationships, not abstractions — the useful questions are documentary:
- What is the written family-limit policy, and can I see the document? Not the web page. The standard operating procedure itself, or the section of the donor agreement that states the limit.
- Which counting method applies to this donor? Pregnancy and birth reporting, or vial-purchase tracking? Ask for the answer in writing, tied to the donor ID.
- Who reports, and how? Is there a form, a portal, an email address? What happens to the count if a parent does not report? Is there any follow-up?
- What record will I receive at the end? If the bank tracks vials, can you see the vial-purchase record for your donor? If it tracks births, what does the reporting log look like, redacted as needed?
- What happens if the limit is reached or exceeded? Is there a waitlist, a sibling registry, a notification to prior families? The page does not say. Ask.
None of these questions require the bank to disclose another family’s identity. They require the bank to describe its own procedure. A bank that cannot answer them is telling you something about the procedure.
Why the number is not the point
There is a temptation to treat 25 as the story — either as a reassuring cap or as an outrage. Both readings miss the structure. The number is a policy choice made by an entity that also counts the outcomes, also writes the consent form, also sells the vials, and also decides what “family” means for the purpose of the count. Whether the number is 10, 25, or 50, the accountability question is the same: who verifies, and what record exists.
For families building outside the standard heterosexual-infertility frame — reciprocal IVF partners, solo queer parents, known-donor arrangements — this question has a particular edge. The paper trail is already doing a lot of work: consent forms, FDA screening records, semen analyses, insurance EOBs, parentage petitions. The family limit sits in that same paper trail, and like the rest of it, it is only as strong as the document you can produce when someone asks.
The 25-family figure is not a law. It is a sentence on a web page, backed by a procedure the bank wrote and a reporting system the parents operate. That is worth knowing before you choose a donor, and worth asking about before you sign.
Questions readers ask
Is 25 families per donor a legal limit?
No federal statute or regulation retrieved for this article sets a maximum number of families or offspring per sperm donor. The 25-family figure appears as Seattle Sperm Bank’s own “standard operating procedure.” 21 CFR 1271 Subpart C, the federal rule that governs donor eligibility, addresses screening and testing for communicable disease agents, not family count.
Does the FDA track how many families a donor has?
The FDA’s donor-eligibility framework, as described in 21 CFR 1271.45 and 1271.50, is about infectious-disease screening and testing. The records that accompany tissue under § 1271.55 concern the donor-eligibility determination, not the number of recipient families. Family-limit tracking is a bank-level practice.
Does ASRM recommend a family limit?
The retrieved ASRM gamete and embryo donation guidance covers donor screening, quarantine, directed versus nondirected donation, genetic evaluation, and counseling. It does not, in the retrieved text, set a maximum number of families per donor.
How do sperm banks count families?
Methods vary. Seattle Sperm Bank’s page describes pregnancy and birth reporting from recipient parents for standard anonymous donors, and vial-purchase tracking for donors with family slots. Those methods count different things, and a family choosing a donor should ask which method applies.
What should I ask a sperm bank about its family limit?
Ask for the written policy, the counting method tied to your donor ID, the reporting mechanism, the record you will receive, and what happens if the limit is reached. These are document requests, not negotiations.