Abstract
Response to most estrous synchronization programs is improved in cycling females, compared to pre-pubertal heifers or anestrus cows. Cycling status is often monitored for research purposes by measuring progesterone concentrations in serum. Producers may want to use information on cyclicity status when determining which estrous synchronization program to use or as a component of their heifer selection. Heat detection patches are routinely used to aid or reduce time needed for heat detection. The most data on their use is for a 3 to 5-day period after estrous synchronization. Little information is available on retention of patches for longer time periods or how they may compare with serum progesterone for determining cyclicity status. Therefore, the objective of the current study was to compare Standing Heat and Estrotect heat detection patches with serum concentrations of progesterone for identifying cycling (pubertal) heifers before the start of the breeding season.
Highlights
Response to most estrous synchronization programs is improved in cycling females, compared to pre-pubertal heifers or anestrus cows
Cycling status is often monitored for research purposes by measuring progesterone concentrations in serum
Little information is available on retention of patches for longer time periods or how they may compare with serum progesterone for determining cyclicity status
Summary
R. (2016) "Effectiveness of Heat Detection Patches for Determining Cyclicity Status in Peripubertal Heifers," Kansas Agricultural Experiment Station Research Reports: Vol 2: Iss. 2. This report is brought to you for free and open access by New Prairie Press. It has been accepted for inclusion in Kansas Agricultural Experiment Station Research Reports by an authorized administrator of New Prairie Press. Copyright January 2016 Kansas State University Agricultural Experiment Station and Cooperative Extension Service. Contents of this publication may be freely reproduced for educational purposes. Brand names appearing in this publication are for product identification purposes only. Nor is criticism implied of similar products not mentioned. K-State Research and Extension is an equal opportunity provider and employer
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