The proposed study will lead directly to real-world applications for the Australian wool industry through the development of an on-animal sensor to monitor reproductive behaviour in sheep. Should the development of this technology be successful, numerous areas of the industry will reap the benefits. The technology will allow for increased individual monitoring of sheep and will give producers the ability to identify sources of reproductive wastage. Further benefits will be seen through increased efficiency of reproduction by eliminating low libido rams, infertile/subfertile individuals, and will result in better management of lambing groups. The proposed research, using on-animal sensors to monitor ram breeding behaviour and identify the time of oestrus of ewes, is clearly linked to the wool/textile industry through the utiliation of new technology to better identify ram and ewe mating events during oestrus. Knowledge gained from this research will be beneficial for the practice of AI for its application and for natural joining. The importance of this study is that it seeks to improve the industry through using new technology to reduce reproductive wastage. Investigating reproductive processes in general, as well as timing of oestrus, libido levels, and time of lambing is vital to the industry as the main industry loss of animals occurs after lambing. Accurate detection of lambing will reduce this main source of loss within the wool/textile industry and benefit both producers and animals.