IVF success rates in Australia and New Zealand have improved due to the increasing trend of frozen embryo transfers while the number of twins and triplets born from IVF are falling.
A study from UNSW revealed there was the largest ever number of babies born through IVF in Australia and New Zealand with 15,613 in 2017 – the most recent year data was available from.
The data shows the overall live birth rate per embryo transfer has increased from 23.6 per cent in 2013 to 26.8 per cent in 2017.
“The improvement in the overall live birth rate has largely been due to improved success rates in cycles using frozen embryos,” Fertility Society of Australia (FSA) president and UNSW professor Michael Chapman said.
For the second year in a row, the birth rate following frozen embryo transfer cycles of 28.9 per cent was higher than fresh embryo transfer cycles of 24.1 per cent, the report says.
Despite the upward trend, the number of twins and triplets born from IVF treatment has hit a record low in Australia and New Zealand’s 40 year IVF history sitting at 3.6 per cent.
FSA vice president and professor Luk Rombauts explains this is due to the increased proportion of IVF cycles where only a single embryo is transferred, which is up from 76 per cent in 2013 to 89 per cent in 2017.
“The Australian and New Zealand region has one of the lowest rates of multiple deliveries from IVF treatment in the world and maintains consistently high success rates,” professor Rombauts added.
“We have achieved this through the commitment of IVF specialists and patients to provide the safest treatment possible, guided by clinical practice guidelines developed by the FSA.”
The report was funded by the Fertility Society of Australia.