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Assisted Reproduction Technology in Australia and New Zealand 2005
Assisted Reproduction Technology in Australia and New Zealand 2005 presents information on all assisted reproduction technology (ART) treatments that took place in 2005 and the resulting pregnancies and births. It is the fourth report using data from the Australian and New Zealand Assisted Reproduction Database (ANZARD) implemented in 2002.
The report presents specific data on success rates based on live births and how they vary by treatment type, cause of infertility, women’s age and number of embryos transferred. Also included is information on birth outcomes such as multiple birth, gestational age, birthweight, and perinatal mortality.
The report will be particularly useful to healthcare professionals, governments, academics and researchers with an interest in ART treatment and outcomes and for people undergoing or considering treatment through ART.
The report on Assisted reproduction technology in Australia and New Zealand 2005 has two components:
1. The report is published and available in both electronic and printed formats.
2. Supplementary tables are available only in electronic format.
Highlights
- There were 51,017 treatment cycles reported to ANZARD in Australia and New Zealand in 2005. Of these cycles, 91.1% were from Australian fertility centres and 8.9% from New Zealand’s centres. There is an increase of 13.7% of ART treatment cycles from 2004.
- Average age of women who had ART treatment in 2005 was 35.5 years, slightly older than average age (35.2 years) of women who had ART treatment in 2002. The proportion of women aged older than 40 years has increased from 14.3% in 2002 to 15.3% in 2005.
- Since ANZARD was established in 2002 there has been a significant increase in the number of embryos transfer cycles where women received single-embryo transfers (SET). SET cycles accounted for 48.3% of embryos transfer cycles in 2005, compared to 28.4% in 2002. The increase of SET cycles resulted more singleton deliveries. The proportion of singleton deliveries was 85.9% in 2005, the highest proportion ever reported.
- Babies born to women who had a single-embryo transfer had better outcomes compared to babies born to women who had a double-embryo transfer (DET). In 2005, there were 3,681 SET babies and 5,589 DET babies. In SET babies, 96.1% were singletons, compared to 61.6% singletons in DET babies. SET babies had a lower proportion of preterm babies (11.7%), compared to 30.6% in DET babies. Similarly, 8.0% of SET liveborn babies were low birthweight, compared to 25.0% in DET liveborn babies.
- Perinatal mortality rate is a measure of perinatal outcomes. In 2005, for all babies born following ART treatment, the perinatal mortality rate was 14.7 deaths per 1,000 births, a 23.8% decrease from 19.3 deaths per 1,000 births in 2004. The perinatal mortality rate was the lowest among singletons born following SET (7.3 deaths per 1,000 births) in 2005.
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