IVF cycles using embryos that have been iced and thawed are just as effective as fresh embryos according to a new UNSW report.
The Assisted Reproductive Technology in Australia and New Zealand 2013 review, by UNSW’s National Perinatal Epidemiology and Statistics Unit (NPESU), displays in the five years to 2013, fresh embryo IVF cycles that resulted in a baby remained stable in around 23%.
However , there has been a more than 25% embrace the birth rate for iced embryo transfers in the last five years, rising from 18% to 23%.
The report also found a growing number of IVF treatments are using iced embryos, from 39% of IVF cycles in 2009 to 45% associated with IVF cycles in 2013.
“Rapid freezing techniques, called vitrification, and optimisation of the timing of embryo transfer have made a true difference to the success of iced embryo birth rates, ” said UNSW Professor Michael Chapman, Vice President of the Fertility Society associated with Australia (FSA), which funds the annual report and national IVF register.
“Other strategies, such as culturing embryos for 5-6 days to a blastocyst, before exchange to a woman, and the use of pre-implantation genetic screening have also increased over the last five years of reporting, ” Professor Chapman said.
The particular report shows a small increase in the number of IVF treatment cycles performed within 2013 with 71, 516 process reported from Australian and Brand new Zealand clinics (66, 143 plus 5, 373 respectively), representing a 1 . 9% increase in Australia plus 3. 8% increase in New Zealand, from 2012.
An overall total of 12, 637 babies had been born following IVF treatment within Australian clinics and 1, 302 in New Zealand clinics within 2013 and 2014.
The report shows the rate associated with multiple deliveries has fallen by a third over the last five years, from 8. 2% in 2009 to 5. 6% in 2013.
“Multiple births are by far the best health risk to mothers plus babies from IVF, and multiple embryo transfer clearly increases this particular risk, ” Professor Chapman said.
“This is one of the lowest rates of multiple deliveries from IVF treatment in the world. ”
The IVF multiple shipping rate is around 26% in the US plus 16% in the UK.
Relate Professor Mark Bowman, President of the FSA, said the results show Sydney and New Zealand is the most secure region in the world for women to have IVF.
“Australia and Brand new Zealand have the lowest IVF multiple birth rates of any area in the world and yet also maintain regularly high success rates, ” Associate Professor Bowman said.
The particular report also shows that the chance associated with IVF success differs depending on a woman’s age. For women aged 30-34 using their own eggs, the birth rate per embryo transfer performed was 32. 8% for clean cycles and 27. 5% meant for frozen/thaw cycles. For women aged over 44, it was 2 . 3% plus 6. 5% respectively.
A review of women who undertook their first ever IVF cycle in 2011 shows that the best chance of success is the initial treatment cycle (20. 6%), using the birth rate falling by 1-2 percentage points for each cycle there after.
This report includes data about IVF cycles carried out in 2013 and the resulting children born in 2013 and 2014. The data is maintained by the NPESU within UNSW’s Centre for Huge Data Research in Health and College of Women’s and Children’s Health on behalf of the FSA.
The above blog post is reprinted from materials given by University of New South Wales. Note: Materials may be edited for content and length.