Two Australian IVF pages can quote very different “success rates” without either number being mathematically wrong. One may mean live birth per cycle started, another pregnancy per embryo transfer, and another the chance after every fresh and frozen embryo from one egg collection. Before a percentage is useful, you need to know what happened, what the denominator was, whose age and eggs are represented, and how long the outcome was followed. This guide uses current Australian data to interpret the numbers without ranking clinics or predicting an individual result.
Quick answers about IVF success rates in Australia
What is the IVF success rate in Australia?
There is no single national IVF success rate because the denominator changes the percentage. In the latest ANZARD report, which combines Australian and New Zealand clinic data, 37.4% achieved a live birth from their first complete ART cycle; among 2024 autologous cycles, live birth was 26.0% per fresh embryo transfer and 33.1% per initiated thaw cycle. These are population benchmarks, not an individual prediction.
How does age affect IVF success rates?
In ANZARD’s latest Australia and New Zealand complete-cycle cohort, first-cycle live birth was 49.4% at ages 30 to 34, 34.1% at 35 to 39, 13.1% at 40 to 44 and 1.8% at 45 or older. Age is a major factor, but these group averages are not an individual prognosis.
Can IVF clinic success rates be compared directly?
Only cautiously. Compare the same outcome, denominator, age group, egg source and treatment approach. Patient characteristics and clinic treatment methods can make raw percentages misleading if those details are different.
IVF success-rate comparison checker
What does that IVF success rate actually measure?
Translate the percentage into an outcome, denominator, population and time scope before comparing it with another figure.
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It cannot predict your personal chance, identify the best clinic or prove that a higher percentage reflects better care.
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IVF success rates in Australia: what the latest ANZARD data show
ANZARD collects treatment and outcome data from Australian and New Zealand fertility clinics and underpins national reporting and the independent YourIVFSuccess resource. The latest annual report covers treatment undertaken in 2024 and was published in August 2026.
Important: unless stated otherwise, the ANZARD rates below combine treatment from Australian and New Zealand clinics. They are the newest population-based registry benchmark for Australian readers, but they are not Australia-only clinic performance rates.
| Measure | Reported result | What to remember |
|---|---|---|
| Autologous fresh live birth per OPU, excluding freeze-all | 17.6% | Uses oocyte pick-up as the denominator and excludes freeze-all cycles. |
| Autologous fresh live birth per embryo transfer | 26.0% | Starts after an embryo is available and transferred, so it is a later denominator. |
| Autologous thaw live birth per initiated cycle | 33.1% | Applies to initiated cycles using previously cryopreserved embryos; 33.5% was reported per thaw embryo transfer. |
| First complete ART cycle | 37.4% | Among 43,849 women starting their first autologous ovarian-stimulation cycle in 2021 to 2022 and followed to the end of 2024. |
| Single embryo transfer / multiple birth | 95.4% / 2.2% | Shows why treatment safety and transfer policy belong beside the headline success percentage. |
These figures answer different questions. The 33.1% initiated-thaw rate and 26.0% fresh-transfer rate are not like-for-like measures. ANZARD notes that thawed embryos were created in an earlier fresh cycle and that treatment selection can contribute to higher thaw-cycle rates; randomised evidence also does not support assuming a freeze-all strategy improves cumulative live birth for everyone.
IVF success rates by age in Australia
Age at treatment and egg collection is one of the strongest predictors of IVF success when using your own eggs. The newest ANZARD report provides age-stratified conservative cumulative live birth rates from a cohort starting a first autologous ovarian-stimulation cycle in Australian and New Zealand clinics in 2021 to 2022 and followed through 2024.
| Age at first treatment | After 1 complete cycle | After 3 complete cycles |
|---|---|---|
| Under 30 | 51.5% | 70.5% |
| 30 to 34 | 49.4% | 69.4% |
| 35 to 39 | 34.1% | 52.0% |
| 40 to 44 | 13.1% | 21.4% |
| 45 or older | 1.8% | 3.1% |
These are conservative cumulative rates: people who discontinued are not assumed to have the same later success as those who continued. ANZARD also reports higher theoretical “optimal” estimates under that assumption, which is why cumulative percentages need their method stated. A birthday does not create a sudden IVF cliff, but the age gradient is substantial. Donor-egg outcomes belong in a separate category because donor age is associated with cumulative live birth.
Start with the denominator: the same clinic can have several correct success rates
| Statistic | What it answers | Why it can look different |
|---|---|---|
| Live birth per cycle started | What proportion of initiated stimulation cycles led to live birth? | Includes cycles that do not reach egg retrieval or embryo transfer. |
| Live birth per egg retrieval | What happened after cycles that reached egg collection? | Excludes treatment cancelled before retrieval. |
| Live birth per embryo transfer | What happened once an embryo was transferred? | Excludes people who had no embryo available for transfer. |
| Clinical pregnancy per transfer | How often a defined clinical pregnancy occurred after transfer? | Clinical pregnancy and live birth are different outcomes. |
| Complete-cycle live birth | What happened after the fresh and all frozen transfers arising from one egg retrieval? | Captures more of the reproductive potential from one stimulation cycle. |
| Cumulative live birth over several complete cycles | What was the chance after more than one egg-retrieval cycle? | Depends on how many cycles are included and how treatment discontinuation is handled. |
One transfer, one complete cycle and cumulative IVF success are not the same
The latest ANZARD cohort shows how the reported chance changes as more complete ART cycles are followed. These conservative cumulative rates use everyone who began complete cycle one as the starting denominator.
| Complete cycles counted | Conservative cumulative live birth rate | Why the number changes |
|---|---|---|
| 1 | 37.4% | Includes the first stimulation cycle and associated subsequent frozen/thaw transfers. |
| 2 | 49.6% | Adds live births achieved in a second complete cycle. |
| 3 | 54.4% | Counts treatment-dependent live births achieved through three complete cycles. |
| 6 | 57.6% | Reflects observed outcomes while treating discontinuation conservatively. |
ANZARD’s theoretical “optimal” estimate reaches 76.9% after six complete cycles only if people who discontinued are assumed to have the same chance as those who continued. That assumption can materially change the headline, and real-world discontinuation is common.
How to compare IVF clinic success rates without being misled
Before comparing clinic percentages, make them answer the same question. Australian guidance cautions that patient populations, treatment methods and reporting measures differ.
- Outcome: Is it live birth, clinical pregnancy, ongoing pregnancy or another endpoint?
- Denominator: Is it per cycle started, egg retrieval, intended transfer, embryo transferred or complete cycle?
- Age and egg source: Does the figure match the relevant age band, and is it own eggs, donor eggs or previously frozen eggs?
- Time horizon: Is it one transfer, one complete retrieval cycle or several complete cycles?
- Transfer practice: Are single and multiple embryo transfers separated or combined?
- Population and reporting period: Is the sample large enough to be useful, and does the comparison represent people with similar clinical characteristics?
A clinic’s raw percentage can still be useful, but it is not a stand-alone quality score and it does not represent one patient’s chance of success.
What should be included in a personal IVF estimate?
A personal estimate should make its assumptions visible. Australian guidance identifies age, the reason for treatment, treatment history and partner or donor factors as relevant to IVF outcomes. Ovarian reserve markers such as AMH and antral follicle count are useful for predicting ovarian response and oocyte yield, but they are weak independent predictors of pregnancy or live birth and should not be treated as a single fertility score.
- Age at egg collection and whether own, donor or previously frozen eggs are being used.
- The diagnosis or reason IVF is being considered and relevant previous treatment history.
- Expected ovarian response and embryo availability, without treating AMH alone as the outcome.
- Sperm, fertilisation and embryo-development factors relevant to the treatment plan.
- The outcome being estimated and whether the estimate covers one transfer, one complete cycle or multiple cycles.
Oocyte yield is associated with cumulative live birth, but reviews do not support turning that relationship into one universal “ideal number of eggs” for every age and clinical situation.
Fresh, frozen and PGT-A success rates need extra context
A higher frozen-transfer percentage does not prove that freezing all embryos improves cumulative live birth for everyone. A Cochrane review found probably little or no difference in cumulative live birth between freeze-all and conventional strategies overall, and a later randomised-trial follow-up also found no significant cumulative live-birth difference in its studied population.
PGT-A can provide information about the chromosome findings tested in an embryo, but it should not be presented as a universal guarantee of implantation, pregnancy or live birth. ANZARD recorded PGT in 9.7% of relevant cycles in 2024, but use is not proof of improved cumulative live birth. Current professional guidance says the value of routine PGT-A for all IVF patients has not been demonstrated.
After repeated unsuccessful treatment, use a stage-by-stage IVF review rather than using one success-rate statistic to choose several add-ons at once.
Cumulative success has a real-world limit: people do not always continue treatment
Cumulative models become more favourable as more complete cycles are counted, but they depend on continued treatment. A 2026 systematic review of 62 studies estimated discontinuation at about 36% across fertility treatment and 37% for assisted reproductive treatment, showing why “after three cycles” is not the same as the experience of everyone who starts cycle one.
IVF can also carry an emotional burden. A 2025 systematic review and meta-analysis found a small but significant increase in anxiety symptoms in IVF groups compared with spontaneous-conception controls, while depression findings were not significantly different in the pooled analysis. This does not mean stress should be blamed for an unsuccessful cycle. It means emotional support and treatment burden belong in informed planning.
Before you pay a clinic deposit, make the percentage and the quote match
A treatment decision should combine the clinical estimate with the financial commitment. IVF and ICSI can involve substantial Australian out-of-pocket costs that vary by treatment and circumstances.
- Ask the clinic to write down the outcome, denominator, age band and egg source used for the quoted success rate.
- Request the personal success range and the assumptions used to calculate it.
- Request a written itemised quote and ask which medicines, procedures, storage, frozen transfers or optional tests are outside it.
- Decide in advance what would trigger a review, pause or second opinion rather than assuming the plan must continue for a fixed number of cycles.
If you are still deciding whether insemination or IVF fits the treatment pathway, see IUI versus IVF decision factors in Australia.
Frequently Asked Questions about IVF Success Rates in Australia
What is a complete IVF cycle?
In ANZARD cumulative reporting, a complete ART cycle is the initial ovarian-stimulation cycle plus subsequent frozen/thaw embryo transfers associated with that stimulation. It therefore follows more of the reproductive outcome from one stimulation than a single transfer does.
Is IVF success per embryo transfer the same as success per cycle?
No. A per-transfer rate starts after an embryo is available for transfer, while a per-cycle-start rate also includes people who do not reach transfer. The two percentages should not be compared as though the denominators are identical.
Why can frozen embryo transfer success rates look higher?
People having a frozen transfer have already reached a point where an embryo was suitable to freeze and later use, so the group and denominator differ. A higher thaw-cycle rate does not prove a freeze-all strategy is better for everyone.
How should donor-egg IVF success rates be interpreted?
Keep donor-egg outcomes separate from own-egg outcomes. Australian population evidence shows donor age has an important relationship with cumulative live birth, so the recipient’s own-egg age statistics are not the correct comparison.
Can AMH predict whether IVF will work?
AMH is useful for estimating ovarian response and likely oocyte yield, but it is only weakly predictive of pregnancy or live birth when considered on its own. Age and other clinical variables remain important.
Can an online IVF estimator predict my result?
An estimator can provide an evidence-based range for people with similar recorded characteristics, but it cannot guarantee an individual outcome. YourIVFSuccess recommends interpreting estimates and clinic comparisons with your fertility doctor or healthcare professional.
Next Steps in Australia
Start with the IVF success-rate comparison checker above to identify the outcome, denominator, age group, egg source and time horizon behind any percentage you are shown. Then compare that figure with ANZARD reporting and YourIVFSuccess, and ask your fertility specialist for a personalised range that explains the assumptions and limitations relevant to your treatment.
Before paying a clinic deposit, request a written itemised quote and make sure the quoted success rate and the quote describe the same treatment plan. Consider live birth, treatment safety, burden, costs and what would happen after an unsuccessful cycle rather than choosing a clinic or treatment from the largest percentage alone.
Last reviewed: 10 August 2026
Next scheduled review: August 2027
References
Fertility2Family articles are researched using Australian Government health guidance, professional clinical recommendations and peer-reviewed medical literature. The references below were used to research and medically review this article and provide additional reading for readers who want to read the evidence in more detail.
National Perinatal Epidemiology and Statistics Unit (NPESU), UNSW Sydney. Annual registry reports
Provides the current ANZARD annual-report series covering treatment activity, live birth outcomes, age, fresh and thaw cycles, cumulative outcomes and assisted reproduction trends across Australia and New Zealand.
National Perinatal Epidemiology and Statistics Unit (NPESU), UNSW Sydney. Assisted reproductive technology in Australia and New Zealand 2024
Reports 2024 ART activity, age-stratified fresh and thaw live birth rates, complete-cycle and cumulative live birth outcomes, single-embryo transfer and multiple birth rates.
National Perinatal Epidemiology and Statistics Unit (NPESU), UNSW Sydney. Australian and New Zealand Assisted Reproduction Database (ANZARD)
Explains ANZARD coverage, clinic data submission, cycle and outcome collection, audit processes, and how national registry data underpin the independent YourIVFSuccess resource.
Better Health Channel, Victorian Department of Health. Age and fertility
Provides Australian complete-cycle live birth estimates by age and explains why age remains a major determinant of IVF success when using a person’s own eggs.
Better Health Channel, Victorian Department of Health. Assisted reproductive technology – IVF and ICSI
Explains Australian IVF and ICSI pathways, personal factors affecting success, live birth terminology and why clinic success rates should be compared using equivalent measures.
Pregnancy, Birth and Baby / Healthdirect Australia. All about in vitro fertilisation (IVF)
Provides current Australian consumer guidance on IVF treatment, factors affecting success, costs, risks and when to discuss treatment decisions with a fertility specialist.
University of New South Wales. Terms of Use
States limitations of clinic comparisons and personalised estimates, including effects of age, diagnosis, ovarian reserve, patient populations and differences in fertility treatment methods.
University of Melbourne. IVF success rates: how successful is IVF?
Presents ANZARD-derived Australian success estimates for one attempt, one complete cycle and multiple complete cycles, with an explicit caveat about treatment discontinuation.
National Health and Medical Research Council. Ethical guidelines on the use of assisted reproductive technology
Sets the Australian ethical framework for assisted reproductive technology, including clinical practice, donor conception, preimplantation genetic testing and national accreditation responsibilities.
Fertility and Sterility. Testing and interpreting measures of ovarian reserve: a committee opinion
Reviews AMH and antral follicle count as predictors of ovarian response and oocyte yield, while noting their weak independent association with pregnancy and live birth.
Fertility and Sterility. The use of preimplantation genetic testing for aneuploidy: a committee opinion
Reviews evidence, limitations and counselling considerations for PGT-A, including uncertainty about routine use and overall reproductive benefit across all IVF patients.
Best Practice & Research Clinical Obstetrics & Gynaecology. Association between the number of oocytes and cumulative live birth rate: A systematic review
Systematically reviews the relationship between oocyte yield and cumulative live birth, highlighting a positive association whose shape and potential plateau differ by age and setting.
Reproductive BioMedicine Online. Is there an optimal number of oocytes retrieved at which live birth rates or cumulative live birth rates per aspiration are maximized after ART? A systematic review
Systematically reviews oocyte yield against fresh and cumulative live birth outcomes, finding different patterns for fresh transfer success and cumulative success across retrieved oocytes.
Fertility and Sterility. Oocyte donor age has a significant impact on oocyte recipients’ cumulative live-birth rate: a population-based cohort study
Australian population-based donor-oocyte cohort examining how donor and recipient age relate to cumulative live birth, supporting separate interpretation of donor-egg and own-egg outcomes.
Cochrane Database of Systematic Reviews. Fresh versus frozen embryo transfers in assisted reproduction
Cochrane review comparing freeze-all with conventional fresh-transfer strategies, finding probably little or no difference in cumulative live birth while identifying differing safety trade-offs.
Reproductive BioMedicine Online. Cumulative live birth rates in a freeze-all or fresh transfer strategy after one ART cycle in ovulatory women
Randomised-trial follow-up comparing freeze-all and fresh-transfer strategies after one retrieval, finding no significant difference in cumulative live birth in the studied population.
International Journal of Gynecology & Obstetrics. Worldwide prevalence of discontinuation in fertility treatment: A systematic review and meta-analysis
Systematic review and meta-analysis quantifying fertility-treatment discontinuation and showing that substantial numbers of patients stop treatment before completing multiple planned cycles.
Fertility and Sterility. The International Glossary on Infertility and Fertility Care, 2025
Provides contemporary consensus definitions for infertility, assisted reproduction and outcome measures to support consistent clinical communication, research reporting and patient understanding.
Frontiers in Reproductive Health. Effects of in vitro fertilization and intracytoplasmic sperm injection treatment on female patients’ perinatal mental health: systematic review and meta-analysis
Systematic review and meta-analysis examining mental