Artificial Insemination: What It Is, How It Works, and What It Costs in the UK

What is artificial insemination?

Artificial insemination is the medical term for placing sperm directly into the reproductive tract to help achieve pregnancy. In UK fertility clinics, this almost always means intrauterine insemination (IUI) — where prepared sperm is placed directly into the uterus through a thin catheter.

The name sounds clinical, but the concept is simple: you're giving sperm a shortcut. Instead of travelling through the cervix (where many sperm are lost), they're placed directly where they need to be — closer to the fallopian tubes where fertilisation happens. The egg is still fertilised naturally inside your body, unlike IVF where fertilisation happens in a lab.

How does artificial insemination work? Step by step

The process is straightforward and usually takes 2–3 weeks from start to finish:

1. Monitoring your cycle

Your clinic tracks your natural cycle using blood tests and ultrasound scans to pinpoint when you're about to ovulate. In a natural cycle IUI, no fertility drugs are used — the clinic simply monitors your body's own timing. In a stimulated cycle IUI, you take low-dose fertility medication (usually Clomid or Letrozole tablets, or injectable gonadotropins) to encourage your ovaries to produce 1–2 mature eggs. Stimulated cycles have slightly higher success rates but also a higher risk of multiple pregnancy.

2. Sperm preparation

On the day of insemination, a sperm sample is produced (either from your partner or a donor). The lab "washes" the sample — separating the healthiest, most motile sperm from the seminal fluid. This concentrated sample is what gets used for the procedure. The washing process takes about 30–60 minutes.

3. The insemination

The actual procedure is quick — around 5–10 minutes. You lie on an examination table (similar to a smear test position), and the doctor or nurse inserts a thin, flexible catheter through your cervix into your uterus. The washed sperm is gently released through the catheter. Most women describe mild discomfort rather than pain. No anaesthesia is needed.

4. The two-week wait

After insemination, you go home and wait approximately 14 days before taking a pregnancy test. There's no bed rest required — you can return to normal activities immediately. Some clinics prescribe progesterone support during this period.

Who is artificial insemination suitable for?

IUI works best in specific situations. It's typically recommended for:

Unexplained infertility — when tests are normal but conception hasn't happened. IUI gives a modest boost over timed intercourse. Mild male factor infertility — low sperm count or reduced motility, where concentrating the sperm helps. If sperm count is very low (under 5 million motile sperm after washing), IUI is unlikely to work and ICSI/IVF is recommended. Same-sex female couples and single women — using donor sperm. IUI is usually the first-line treatment before IVF. Cervical factor infertility — where the cervix is hostile to sperm (e.g. after surgery or due to cervical mucus issues). IUI bypasses the cervix entirely. Ovulation disorders — combined with ovulation-inducing medication, IUI can be effective for women who don't ovulate regularly (e.g. PCOS).

When artificial insemination won't work

IUI is not suitable if you have blocked fallopian tubes (since fertilisation happens inside the body, at least one tube must be open), severe male factor infertility, severe endometriosis, or if the woman is over 40 (where IVF gives meaningfully better odds). If you've had 3–6 unsuccessful IUI cycles, most UK consultants will recommend moving to IVF.

Success rates: what are the real numbers?

Let's be direct about the numbers. Per individual cycle, IUI success rates are modest:

These are per-cycle figures. The reason clinics recommend trying 3–6 cycles is that the cumulative odds add up. Three IUI cycles for a woman under 35 give roughly a 30–40% cumulative chance of pregnancy. But if your first three cycles don't work, the odds of cycle four working drop — which is when the conversation shifts to IVF.

How much does artificial insemination cost in the UK?

IUI is significantly cheaper than IVF. Here's what to expect at a private UK clinic in 2026:

For comparison, a single IVF cycle costs £3,500–£7,000 before medication, which adds another £500–£2,000. So three IUI cycles might cost you £3,000–£5,000 total, while one IVF cycle costs a similar amount but with 2–3x the success rate per attempt.

This is where the cost per live birth metric matters — the figure we calculate for every clinic on Vero. A cheaper treatment with lower success rates can end up costing more overall than a more expensive treatment that works sooner.

Artificial insemination vs IVF: which should you choose?

This isn't an either/or decision for most people — it's a sequence. Most UK fertility pathways start with IUI (if appropriate) and progress to IVF if needed. The key factors:

Start with IUI if: you have unexplained infertility, mild male factor, you're using donor sperm, you're under 38, and your tubes are open. Go straight to IVF if: your tubes are blocked, you have severe male factor infertility, you're over 40, you have advanced endometriosis, or you've already tried IUI without success.

For a detailed breakdown of how the two treatments compare on every metric, see our full guide: [IVF vs IUI: What's the Difference and Which Is Right for You?](/blog/ivf-vs-iui-difference)

Is artificial insemination available on the NHS?

Yes, but availability varies dramatically depending on where you live. IUI is commonly funded for same-sex female couples and single women using donor sperm. For heterosexual couples, some Integrated Care Boards (ICBs) offer IUI as a first step before IVF funding, while others skip IUI entirely and go straight to IVF.

The eligibility criteria also vary by area — age limits, BMI requirements, and whether you already have children all affect funding. Use our [NHS IVF eligibility calculator](/nhs-calculator) to check what's available in your area.

Finding a clinic for artificial insemination

Almost all HFEA-licensed fertility clinics in the UK offer IUI alongside IVF. When comparing clinics for IUI specifically, look at:

IUI-specific success rates — not all clinics publish these separately from their IVF figures. Ask directly. Total cost per cycle — make sure you're comparing like for like. Some clinics quote IUI without scans or medication; others include everything. Location and convenience — IUI requires multiple monitoring appointments per cycle, so a clinic close to home or work makes a practical difference. Donor sperm availability — if you need donor sperm, check whether the clinic has an in-house sperm bank or sources externally, and what the total cost including sperm is.

You can compare IUI clinics near you — including those offering both IUI and IVF — using our [clinic search tool](/search). Filter by treatment type to find clinics offering IUI in your area.

The bottom line

Artificial insemination is a good first step for the right patients. It's simpler, cheaper, and less physically demanding than IVF. But it's not a substitute — the success rates are meaningfully lower, and if it doesn't work after 3–6 attempts, IVF is the logical next step. The important thing is understanding where you sit and making an informed decision rather than spending months on a treatment that isn't right for your situation.

Not sure which treatment is right for you? Our [2-minute quiz](/find-my-match) matches you with clinics based on your specific situation — treatment type, location, budget and priorities.