Fig. 1

a Total volume of autologous oocyte ART cycles for study period 2004–2013. The figure demonstrates gradually increasing ART cycle number in most regions, except for Japan, which demonstrates a rapid increase in cycle number. European cycle volume fluctuated depending on number of reporting countries in that region each year. b Proportion of ART cycles which utilized frozen-thawed embryos created from autologous oocytes. The figure demonstrates that utilization of previously cryopreserved embryos has increased in all regions except Australia/New Zealand