In 2009, there were 70,541 assisted reproductive technology (ART) treatment cycles undertaken in Australian and New Zealand. Of these cycles, 17.2% resulted in a live delivery (the birth of at least one liveborn baby). In total, 13,114 liveborn babies were born following ART treatment in 2009. The most important trend in ART treatment has been the increase of single embryo transfer, from 48.3% in 2005 to 69.7% in 2009. This trend has resulted in significant reduction of multiple delivery rate from 14.1% in 2005 to 8.2% in 2009.