The optimal time of artificial insemination (AI) was determined from data for 2661 AI in 17
herds utilizing a radiotelemetric system for estrus detection that has the potential for …

The efficiency and accuracy of estrus detection using HeatWatch®(DDx Inc., Denver, CO) or
visual observation were compared in an autumn-calving Friesian herd (n= 48 per group) …

The ability of management to detect estrus efficiently and accurately in cows and heifers
profoundly influences reproductive performance and profitability of dairy herds. Routine …

The objective of the study was to compare three systems for estrus detection and
combinations of these systems on a large commercial dairy (1075 lactating cows) during …

Methods to improve detection of estrus in dairy cows have been studied extensively without
wide acceptance of any one method. In the present study, the use of body temperatures and …

The length and onset of estrus was studied in 71 lactating dairy cows using an electronic
heatmount sensor (HeatWatch; DDx Inc., Boulder, CO, DeForest, WI) and an electronic …

Time of ovulation was determined for Holstein cows (n= 51) for estruses occurring
spontaneously (n= 33) or those induced by PGF2α (n= 86). Ultrasound examination of …

Two experiments were conducted to evaluate an accelerometer system (Heatime; SCR
Engineers Ltd., Netanya, Israel) to manage reproduction in lactating dairy cows. In …

Despite the widespread adoption of hormonal synchronization protocols that allow for timed
artificial insemination (AI), detection of estrus plays an important role in the reproductive …

The objective of this study was to determine if there is an association between level of milk
production and duration of estrus as determined by standing activity recorded by a …