Estrous detection systems

Details Estrous detection systems Estrous detection systems

1990-03-28

1992-05-12

Smith, Ruth S.

Surgery

Truss

Pad

128774, A61B 1000

Patent

active

051117991

ABSTRACT:
Disclosed is an apparatus for estrous detection, analysis and telemetric communication of a signal indicating estrus. The apparatus is specially adapted for surgical implantation on the hindquarters of cattle or other animals which exhibit selective standing heat behavior often termed standing to be mounted. The apparatus which is implanted under the hide of the animal, comprises a self contained power source, a force responsive sensor, a controller, a transmitter, an antenna, and a fluid-tight capsule which surrounds the other elements of the apparatus. The apparatus operates by sensing force applied during sustained mounting of an animal which is in estrus by another animal in the herd. The implantable apparatus analyzes the duration of mounting to discriminate standing heat mountings from shorter duration spurious mountings which routinely occur in cattle herds. The number of standing heat mountings which occur in a fixed period, for example 8 hours, are counted and the frequency is compared to a threshold which determines whether estrus should be indicated by transmitting a telemetric signal from the implanted apparatus. The telemetric signal is broadcast from the subcutaneous location to a receiver and suitable indicator from which the state of estrus can be perceived by the herdsman. The systems allow fully automated estrous detection and analysis to be performed. Also disclosed are methods for detecting, analyzing and signaling estrus in animals exhibiting standing heat behavior.

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Thompson, et al., Transducers for Capture of Activity Data, paper presented at 78th Annual Meeting of American Dairy Science Assn., Jun. 1983, Univ. Wisconsin.
Activity Monitor brochure, Dairy Equipment Co., Madison, Wis. 1984.

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