Heat detection is one of the crucial components in the reproduction management of dairy animals, as it contributes towards the ultimate pregnancy rate. Improper heat detection and insemination of dairy animals incurs heavy loss in terms of wasteful expenditure of quality male germplasm, production loss and increase risk of introducing genital infections in the female. In this regard attaining higher heat detection efficiency and accuracy is important key to improve individual animal and overall herd fertility. Heat in cow is fairly a well-defined period when she exhibits sexual desire and receptivity to the male. Standing to be mounted by herd mates is considered as the best indicator of an animal in heat. Based upon above-mentioned behavioural changes different methods of heat detection have been developed. The selection of proper heat detection method for a particular dairy farm is dependent on several factors like scale of operation, availability of manpower, type of animals etc. and a single aid cannot be used invariably

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