| Published: 6 March 2026 Last reviewed: 6 March 2026 Reviewed by: Dr Anthony Marren, CREI - Medical Director Sydney CBD Genea |
IUI and IVF: What’s the difference?
IUI (Intrauterine insemination) and IVF (In vitro fertilisation) are two of the most common fertility treatments available in Australia, but they work differently, suit different circumstances, and come with different cost and emotional considerations.
Understanding the key differences can help you feel more confident heading into your first specialist consultation.
What is IUI?
Intrauterine insemination (IUI) is a minimally invasive procedure where prepared sperm is placed directly into the uterus during ovulation, shortening the journey sperm needs to make to reach the fallopian tubes.
IUI is commonly recommended for people with unexplained infertility, mild male factor infertility, or those using donor sperm. It can be performed as a natural cycle, or alongside ovulation induction medications for more controlled timing.
What is IVF?
In vitro fertilisation (IVF) is a more involved process where eggs are retrieved from the ovaries, fertilised with sperm in a laboratory, and the resulting embryo is transferred back into the uterus. A full cycle typically spans two to four weeks.
IVF is recommended for more complex fertility challenges including blocked fallopian tubes, severe male factor infertility, endometriosis, advanced maternal age, or after unsuccessful IUI cycles. It also allows for preimplantation genetic testing (PGT) to screen embryos before transfer, and any surplus embryos can be frozen for future use.
Key differences at a glance
| IUI | IVF | |
|---|---|---|
| Invasiveness | Low | Higher |
| Per-cycle success rate | 15-20%* | ~40-50% (under 35) |
| Best suited to | Mild infertility, donor sperm, early-stage treatment | Moderate to severe infertility, complex cases, older patients |
| Approximate cost per cycle | ~$2,000 | ~$8,000–$12,000 |
| Time commitment | Minimal | Intensive |
*Per-cycle success rates for IUI vary based on the patient's age and reason for treatment.
IUI vs IVF success rates
At Genea, our independently audited NPESU results consistently perform above national averages. For women under 35, our live birth rate per complete IVF cycle is 54.2%, compared to 47.5% nationally. For women aged 35-42, we achieve 30% compared to 25.8% nationally.
As Dr Anthony Marren, Fertility Specialist at Genea, notes: "IVF is more effective in older women, while IUI may be a suitable option in younger age groups, but the cause of infertility, treatment history, and personal circumstances all factor into which path makes the most sense."
How to choose
There's no universal answer. Your fertility specialist will consider several factors with you, including:
- Your age - IUI effectiveness decreases with age; IVF is often recommended from the outset for women over 38
- Your diagnosis - blocked tubes, severe male factor, or endometriosis typically point toward IVF
- Your treatment history - most specialists suggest reassessing after three to six IUI cycles without success
- Time sensitivity - IVF is more efficient per cycle, particularly for those with advanced maternal age
- Cost - IUI is more affordable per cycle, though cumulative costs across multiple cycles can add up; both may attract Medicare rebates
We're here to help
Whichever path you're considering, you don't need to have it all figured out before reaching out. A comprehensive fertility assessment is the best first step, from there, you'll have a personalised treatment plan built around your circumstances and goals. Fertility counselling is also included as part of your treatment cost at Genea, so support is always available.
Ready to take the next step? Contact our Fertility Concierge today.
IVF is more effective in older women, while IUI may be a suitable option in younger age groups, but the cause of infertility, treatment history, and personal circumstances all factor into which path makes the most sense.
Disclaimer: Please note that this is a Genea Group blog and as such information may not be relevant for all clinics. We advise that you consult clinics directly for further information.
FAQs
IUI places prepared sperm directly into the uterus during ovulation, while IVF involves retrieving eggs, fertilising them in a laboratory, and transferring the embryo back into the uterus. IVF is more involved but generally offers higher success rates per cycle.
IUI is best suited to people with unexplained infertility, mild male factor infertility, or those using donor sperm, particularly younger women in the earlier stages of their fertility journey.
Most specialists suggest reassessing after 2-4 cycles. If IUI hasn't been successful by then, IVF is often the recommended next step, though this depends on your age and diagnosis.
Yes, both treatments can be performed using donor sperm, depending on which donor is selected. Genea's sperm bank provides access to a broad range of local and international donors.
IUI typically costs ~$2,000 per cycle, while IVF ranges from ~$8,000–$12,000. Both may attract Medicare rebates, and Genea offers flexible payment plans to help make treatment more accessible.
Fertility counselling is included as part of your treatment cost at Genea, giving you access to professional psychological support throughout your journey at no additional charge.
That's completely normal. A specialist consultation and thorough fertility assessment will help clarify which treatment pathway is most appropriate for your individual circumstances.