'Assisted Reproduction Technology in Australia and New Zealand 2004' presents information on all assisted reproduction technology (ART) treatments that took place in 2004 and the resulting pregnancies and births. It is the third report using data from the Australian and New Zealand Assisted Reproduction Database implemented in 2002. The report includes information on ART treatment and on intra-uterine insemination using donated sperm. It 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, produced by the AIHW National Perinatal Statistics Unit based at the University of New South Wales, 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.