Merck Manual

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Activity sensor system showing cows in estrus
activity-sensor-system-showing-cows-in-estrus-statham-sized
Activity sensor system showing cows in estrus

    This activity sensor system produces a list of cows within a herd that have been detected to be in estrus. For the herd represented here, the system has detected two cows in heat.

Courtesy of Dr. Jonathan Statham.