Success Rates

We understand all couples with fertility problems want to be treated in a clinic that has the highest possible success rates. At Fertility Plus, we are proud of our consistently good success rates. 

It's important to remember that, for each individual couple, their underlying fertility problem and age will be more useful in predicting their success rate than looking at the clinic success rates overall.

Understanding pregnancy rates

Pregnancy rates can be expressed in a variety of ways, which can make comparing results between clinics difficult. It can also provide overly optimistic or pessimistic information for couples depending on where they are in their treatment experience.

Typical ways of expressing pregnancy rate include:

Live birth rate per treatment cycle started This gives the lowest success rate as it includes cycles where women over or under responded to stimulation drugs – this includes those who did not go on to the egg collection stage, where no eggs were collected, or no eggs fertilised, or where the embryos were frozen without a fresh embryo transfer to avoid OHSS.

Clinical pregnancy rate per embryo transfer This does not consider women who subsequently miscarry or the pregnancies that result from the use of any frozen embryos.

Cumulative live birth rate per fresh embryo transfer and any subsequent frozen embryo transfers This includes all babies born from a single egg collection, after either a fresh or frozen embryo transfer. This gives the chance of a live birth from an egg collection after having a fresh transfer and/or thawed embryo transfers. This method of showing success rates is the most useful for couples about to embark on their first cycle of IVF. It takes into account that some couples who do not conceive on a fresh embryo transfer from their IVF cycle may have a successful pregnancy following a frozen embryo transfer. About 70% of our couples have embryos frozen. Fertility Plus has maintained a high pregnancy rate from thawed embryo cycles for many years.

Couples having publicly funded treatment must thaw their frozen embryos before having a second publicly funded cycle. If they conceive from the first IVF cycle, the public funding still covers the thawing and replacement of any remaining frozen embryos up until there are two children born to the relationship.

IVF pregnancy rates

The specialist at Fertility Plus can give you statistics for your individual chance of a live birth based on your age, cause, and length of time of infertility. The most important factors affecting success rates are female age and cause of infertility. The following data is the live birth rates per fresh embryo transfer and frozen embryo transfer from 2020. It does not include treatments that used donor eggs.

It is useful to know that not every cycle of IVF that starts will result in an embryo transfer – some cycles don’t make it to egg collection, some cycles don’t have eggs at egg collection and sometimes the eggs don’t fertilise. At Fertility Plus:

  • around 70% of cycles will have embryos to freeze.
  • 99% of all our fresh and frozen embryo transfers are single embryo transfers.
  • around 40% of our egg collections have all the embryos frozen and the embryos thawed later to reduce the risk of OHSS.

The Reproductive Technology Accreditation Committee of Australia and NZ (RTAC) have requested that all clinics present their data as live birth rates and separated into the following age groups, so it is easier for consumers to understand clinic success rates. For further information and for help understanding please visit our page on choosing an IVF clinic and understanding success rates.

2020 Live Births Per Frozen Embryo Transfer

<30 Years

30-34 Years

35-39 Years

40-44 Years


2020 Live Births Per Fresh Embryo Transfer

<30 Years

30-34 Years

35-39 Years

40-44 Years


The charts below are taken from the 2020 report from the National Perinatal Epidemiology and Statistics Unit (NPESU) and the University of New South Wales who provide an annual report of every IVF cycle undertaken in New Zealand and Australia. 

Age group (years) (a)
Stage/outcome of treatment <30 30-34 35-39 40-44 ≥45 All
Initiated cycles 5190 14,442 20,848 13,355 1,197 55,032
Cycles with OPU 4,754 13,339 18,963 11,630 981 49,667
Freeze-all cycles (b) 2,232 5,507 7,217 2,869 114 17,939
Embryo transfer cycles 2,076 6,415 8,947 5,799 502 23,739
Clinical pregnancies 969 2,770 2,993 977 23 7,732
Live births 848 2,340 2,262 546 6 6,002
Live births per initiated cycle (%) 16.3 16.2 10.8 4.1 0.5 10.9
Live births per initiated cycle (excluding freeze-all) (c) (%) 28.7 26.2 16.6 5.2 0.6 16.2
Live births per embryo transfer cycle (%) 40.8 36.5 25.3 9.4 1.2 25.3
Live births per clinical pregnancy (%) 87.5 84.5 75.6 55.9 26.1 77.6

(a) Age at start of treatment cycle.
(b) Freeze-all cycles are fresh ART treatment cycles where all eggs or embryos are cryopreserved for potential future use.
(c) Live births per initiated cycle (excluding freeze-all) were calculated using live births as the numerator and initiated fresh cycles minus freeze-all cycles as the denominator

Your IVF Success Estimator

Estimate your chance of having a baby using IVF, based on data from all woman who have undergone IVF in Australian fertility clinics.

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Donor Insemination pregnancy rates

The most important factor affecting success rates for donor insemination (DI) is female age. With successive cycles an increasing proportion of women receiving DI treatment will conceive. The pregnancy rate for women under 40 years of age having DI at Fertility Plus is approximately 20% per insemination. This is based on the last 10 years results.

Click here to find out more about donor insemination.

Intra-uterine Insemination (IUI) success rates

Success rates for individual couple vary significantly with female age. For women under 40 years of age having Intrauterine insemination (IUI) at Fertility Plus, the clinical pregnancy rate over the last 10 years is approximately 13% per insemination. As with DI, women having successive cycles of IUI will increase their chances of conceiving.

Click here to find out more about IUI.