Australian & New Zealand IVF success rates
According to the latest data from the Australian & New Zealand Assisted Reproductive Department report, the average IVF success rates in Australia for a fresh embryo transfer leading to a live birth vary from 39.4%* for women under 30 years of age using their own eggs to 9.2%* for women aged from 40-44 using their own eggs.
Understanding IVF success & statistics
If you are considering IVF treatment we understand that IVF success rates will be important to you. It is essential to understand what IVF statistics mean, so you can make the right decisions for your future.
What is an IVF treatment cycle?
A typical IVF treatment cycle involves the following steps:
- fertility drugs are injected to stimulate a woman's ovaries (ovarian hyperstimulation);
- eggs are collected from the woman (sometimes referred to as "oocyte pick-up" or OPU), a day surgery procedure conducted under local anaesthetic;
- the eggs are then fertilised and matured. This may or may not involve other processes such as ICSI (intracytoplasmic sperm injection, a process in which a single sperm is injected into each egg to assist fertilisation using very fine micro-manipulation equipment) or Digital High Magnification sperm selection (which can assist men with DNA damage in their sperm) ;
- one or more embryos may be transferred to the woman's uterus (a "fresh embryo transfer"); and
- other embryos may be frozen and transferred later (a Frozen Egg Transfer or FET), until all embryos resulting from the initial hormone treatment and OPU have been exhausted.
How do you measure IVF success?
When it comes to IVF, there is no agreed standard for reporting "success".
Sometimes IVF success rates are quoted per complete IVF collection and treatment cycle. A full IVF collection and treatment cycle can involve multiple transfers of embryos collected from the one egg collection. Success rates measured this way will therefore naturally be higher than success rates measured per embryo transfer.
At IVF Australia, we most often measure IVF success rates as clinical pregnancies (a pregnancy confirmed by a blood test and ultrasound scan, usually at around 6-8 weeks) per embryo transfer. Sadly, not every pregnancy will carry to a live birth, so we will sometimes quote live births per embryo transfer as well as clinical pregnancies per transfer.
Although important, the embryo transfer is only one part of an IVF treatment cycle. not every treatment cycle will result in an embryo transfer, for some women, no eggs will be collected, and, sometimes after eggs have been collected, there may be no transfer because embryos have not developed.
It is therefore important to understand what part of the IVF cycle a particular statistic is measuring. Even after you check this, there are other factors that need to be understood before you attempt to compare IVF success rates. For example:
- the most important factor determining IVF success rates is a woman's age. When comparing IVF success rates, as well as checking what is being measured, check you are comparing rates for women of the same age. If 'whole of clinic' rates are quoted, consider whether the clinic might, overall, have older or younger clients than average - or do they perhaps send their more difficult cases to a different clinic altogether?
- Ask how often a clinic transfers more than one embryo with each transfer. More embryos per transfer may make success rates appear higher (this is a key reason some US rates appear higher than ours), but IVFAustralia rarely performs multiple transfers, as it can also increase the risks of multiple births, low birthweight and premature births.
- Check whether the data includes processes like ICSI, or includes frozen embryo transfers or only 'fresh'.
IVF Australia success rates
At IVF Australia we are proud of the success rates we are achieving for our patients. Together with our partner clinics in Melbourne, Queensland and Tasmania, we’re responsible for more births through IVF treatment than any other fertility group in Australia.
The following graph shows the proportion of IVF Australia patients who had a fresh embryo transfer using their own eggs that resulted in a clinical pregnancy and then a live birth in 2012 . It does not include any additional frozen embryo transfers that may have eventuated from that fresh cycle.
Want more information about IVF success rates?
Understanding IVF success rates can be complex. At IVF Australia we will always explain, as carefully as practical, how any data is calculated. Individual factors also affect every patient's prospects of success. The best way to understand the likelihood of success for you, and your partner, is to arrange a consultation with one of our fertility specialists. Our role is to give you a thorough understanding of your own personal situation, and to work with you to develop the most suitable treatment plan to give you, your best possible chance of taking home a baby.
*Table 9: Outcomes of autologous fresh cycles by women’s age group, Australia and New Zealand, 2013 Macaldowie A, Lee E & Chambers GM 2015. Assisted reproductive technology in Australia and New Zealand 2013. Sydney: National Perinatal Epidemiology and Statistics Unit, the University of New South Wales.