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Estrus detection has been cited as one of the most important factors affecting the reproductive success of artificial insemination programs. Many factors affect the expression, intensity and duration of estrus. Several factors including environmental and housing conditions, leg problems, milk yield and status of the herd have to be considered for establishing of an efficient management of heat detection. Technological aids to improve heat detection include the use of tail paint, vasectomised bulls, pressure activated heat mount detectors, radio telemetric devices, pressure sensitive mount count devices, progesterone analysis, vaginal probes and pedometers. As herd size increases and labour become more expensive there will be a greater adoption of some of these technological aids. Costs and sensitivity of different equipments for heat detection are important for the utilization in cattle farms. But the essential factor affecting heat detection is that the staff responsible for checking for heat should fully understand the signs of heat and be fully committed to heat detection in an optimal management. Technological aid can support this management in a positive manner.