Most people using donor sperm start with IUI, which usually uses one IUI-prepared vial per insemination, and move to IVF if several IUI cycles fail, if age or a fertility diagnosis lowers the odds, or if the cost of vials per attempt starts to rival IVF. A sensible vial plan covers the cycles you expect to try plus a reserve for possible siblings, because popular donors sell out. Your clinic, not the bank, should set the number of vials per cycle.
IUI vs IVF with donor sperm
Single people and same-sex female couples using donor sperm often have no known fertility problem. For them, IUI is the usual starting point: it is less invasive, less expensive per attempt, and uses fewer resources. IVF becomes the better tool when the odds per IUI are low or when you want to make the most of limited vials.
| IUI with donor sperm | IVF with donor sperm | |
|---|---|---|
| What happens | Washed sperm placed in the uterus at ovulation | Eggs retrieved and fertilized in the lab; embryo transferred |
| Vials per attempt | Usually one, sometimes two if two inseminations are done | Usually one for the retrieval; ICSI is often used with frozen donor sperm |
| Needs open tubes? | Yes | No |
| Extra embryos for siblings | No | Possibly, from one vial |
| Medication | None, oral drugs, or low-dose injections | Daily injections for about two weeks |
| Cost per attempt | Lower | Higher, but may need fewer vials overall |
For a fuller comparison of the procedures, see our IUI guide and our breakdown of IUI costs, including donor sperm. Some people try at-home insemination first; FertileStart covers at-home ICI kits, timing and technique, and the main differences are discussed below.
ICI vials vs IUI vials
Sperm banks typically sell two preparations:
- ICI (unwashed) vials still contain seminal fluid. They are meant for intracervical insemination, at home or in a clinic. Unwashed semen should not be placed directly into the uterus.
- IUI (washed or prepared) vials have been processed to remove seminal fluid and are ready for intrauterine insemination. Many clinics can also wash an ICI vial on site.
Banks report a motile sperm count per vial, often post-thaw, but the way it is measured and the minimum guaranteed vary by bank. Ask your clinic which preparation and minimum motile count it wants, and whether it will accept vials from your chosen bank. The same “total motile count” idea clinics use for partner sperm applies here: what matters is how many moving sperm reach the uterus, not the label on the box.
How many vials to buy
There is no official number. A practical way to estimate is to add up three things:
- Your planned IUI attempts times the vials your clinic uses per insemination. Ask your clinic how many IUI cycles it typically recommends for someone with your age and history before reassessing.
- A buffer for IVF, if you might switch. One vial is often enough for a retrieval when ICSI is used, but some clinics like a backup vial in storage.
- Sibling reserve, if you might want a genetically related second child. This is the most-regretted gap: popular donors often reach their family limit or stop donating, and their vials can disappear from catalogs.
Donor screening, quarantine and family limits
Under FDA rules (21 CFR Part 1271), sperm from an anonymous donor must be screened and tested for infectious diseases, including HIV, hepatitis B and C, syphilis, chlamydia and gonorrhea, and must be quarantined until the donor is retested at least six months after donation. Regulated sperm banks handle this before releasing vials.
Directed (known) donors are treated differently. The FDA exempts directed-donor specimens from the six-month quarantine, but ASRM’s 2024 donation guidance recommends quarantining directed-donor sperm for 35 days followed by retesting for infectious diseases. ASRM also “strongly recommends” that everyone involved in a directed donation consult an attorney, and recommends counseling sessions for donors and recipients.
On family limits, ASRM’s guidance notes a suggestion that, in a population of 800,000, limiting a single donor to no more than 25 births would avoid a significant increase in the risk of accidental relationships between half-siblings. Banks set their own limits, often expressed as a number of families. Ask how your bank tracks and enforces its limit, and whether it includes births reported from other countries.
Identity-release versus anonymous donors
Many banks label donors as identity-release (sometimes called open ID), meaning the child can request identifying information or contact at adulthood, or as non-identity-release. With consumer DNA testing widely available, ASRM’s 2024 guidance notes that anonymity is decreasing. Choose with your future child’s perspective in mind, and read exactly what the bank promises: whether contact is guaranteed, what happens if the donor cannot be located, and whether the bank runs a sibling registry so donor-conceived half-siblings can connect if they wish.
Buy for your realistic plan, plus siblings if they matter to you.
- Usually discussed when
- You have chosen a donor and are about to purchase vials.
- Main upside
- Enough vials from one donor avoids switching donors mid-plan or losing a sibling match.
- Main tradeoff
- Extra vials cost money to buy and store, and may not be refundable.
When to switch from IUI to IVF
Clinics weigh the same factors for donor-sperm patients as for anyone else, with one twist: every attempt uses vials you may not be able to replace.
- Several unsuccessful IUIs. Ask your clinic how many it recommends before reassessing for someone your age.
- Age. As age rises, per-cycle IUI odds fall faster, and the value of creating and testing embryos rises.
- A diagnosis. Blocked tubes, endometriosis, low ovarian reserve or ovulation problems can make IVF the better first choice.
- Vial economics. If you are running low on vials from a donor you love, IVF can produce several embryos from one vial.
- Family-size goals. Embryos created now with one donor give a path to genetically related siblings later.
Same-sex female couples may also choose IVF for reciprocal treatment, where one partner provides the eggs and the other carries. Our guide to reciprocal IVF explains how that works, and our LGBTQ+ family building hub covers the wider options. HowToHaveABaby’s guides to same-sex family building options and single parent by choice paths add the planning side.
If you are also deciding whether to freeze eggs or create embryos with your donor’s sperm, see our guide to freezing eggs or embryos.
- How many vials do you use per IUI, and do you require IUI-prepared vials?
- What minimum post-thaw motile count do you want per vial?
- How many IUI cycles would you recommend for me before considering IVF?
- If we switch to IVF, how many vials do you want on hand for retrieval day?
- Bank: what is your family limit for this donor, and how many vials remain?
- Bank: what are your storage, transfer and buyback policies?
- Bank: is this donor identity-release (open ID), and what contact can my child request at 18?
When to see a doctor: ASRM’s fertility-evaluation guidance supports earlier evaluation from age 35 and without delay after 40 or with irregular cycles, known tubal or uterine disease, or endometriosis. If any of those apply, ask whether a basic workup (ovarian reserve and a tubal check) makes sense before your first insemination, so vials are not spent on cycles with low odds.
- Same-Sex Family Building: A Complete Options Guide (HowToHaveABaby)
- Single Parent by Choice: Fertility Paths Forward (HowToHaveABaby)
- At-Home Insemination (ICI): Kits, Timing, Technique, and Success Rates (FertileStart)
Compare clinics in Colombia
Some patients compare accredited fertility clinics in Colombia. Ask any clinic for a written all-in quote (medications, monitoring, embryo freezing) and its age-specific outcome data before deciding.
Questions? Message us on WhatsApp and we’ll point you to clinics and next steps. We may earn referral fees from partner clinics.
Frequently asked questions
How many vials of donor sperm do I need per IUI?
Usually one IUI-prepared vial per insemination. Some clinics do two inseminations per cycle and use two vials. Your clinic should set this, not the bank.
Can I use ICI vials for IUI?
Not directly. Unwashed ICI vials contain seminal fluid and should not be placed in the uterus, but many clinics can wash an ICI vial for IUI. Ask your clinic first.
How many donor sperm vials should I buy for a sibling?
There is no fixed number. Estimate the vials you would need for another series of IUIs or one IVF retrieval, and check whether the bank offers storage or buyback for unused vials.
Why is donor sperm quarantined for six months?
FDA rules require anonymous donor semen to be quarantined until the donor is retested for infectious diseases at least six months after donation, which protects against infections not yet detectable at the time of donation.
Do known donors have to follow the same rules?
FDA exempts directed-donor specimens from the six-month quarantine, but ASRM recommends a 35-day quarantine with retesting and strongly recommends legal consultation for everyone involved.
Sources & guidance
- eCFR: 21 CFR Part 1271, Subpart C, Donor eligibility (1271.60 quarantine; 1271.85 testing and six-month retesting; 1271.90 exceptions); up to date as of October 7, 2026
- ASRM: Gamete and embryo donation guidance (2024). Fertil Steril 2024;122:799-813
- ASRM: Fertility evaluation of infertile women (2021)