Heat Detection and Timing of Insemination
Extension Circular 402 - Heat Detection and Timing of Insemination for Cattle
Topics covered in this publication include information about
characteristics of the estrous cycle, signs of heat, factors affecting
estrous behavior, the timing of insemination, milk progesterone
analysis as a tool for heat detection, evaluation of heat detection
efficiency, and estrous detection aids.
Video:
Heat Detection in Dairy Cattle
Accurate and efficient heat detection in dairy cattle is a critical
component of an artificial insemination program. While it is essential
for maintaining a profitable calving interval, heat detection has
always been a major challenge to most dairy herd managers. This video
reviews heat detection as it applies to dairy herd management and
describes basic physiological events associated with the estrous cycle.
The primary and secondary signs of estrus are presented in detail, as
well as factors affecting estrous behavior, timing of insemination, and
management practices that optimize heat detection efficiency. [1990,
VHS, 21 minutes, $35]. Order this video.
Insemination Techniques
Topics covered in this circular include Reproductive Anatomy, Preparations for Insemination and Sanitation, General Tips for Insemination Technique; Accuracy of Insemination, Evaluating Success and Need for Retraining.
Video: Uterine Body Insemination
Accurate placement of semen during artificial insemination is
important for achieving good conception rates. This video is intended
as a review for those trained in uterine body insemination, such as
herd managers who inseminate their own cattle. It describes basic
reproductive anatomy and the rectovaginal technique of insemination,
including cervical manipulation, correct semen placement, and
evaluation of insemination rod tip placement. The video may be useful
to dairy and beef cattle producers, artificial insemination industry
personnel, veterinarians, and college students. [1990, VHS, 12 minutes,
$35]. Order this video.
More Publications
DAS 2005-99 Systematic Breeding Program for Dairy Cows
This fact sheet explains the basic concepts of systematic breeding
programs for dairy cattle. Systematic breeding is also termed estrous
synchronization, controlled breeding and timed insemination. The basic
concepts in this publication include: advantages of systematic
breeding, hormones used for various programs and factors important to
achieving success with such programs.
DAS 00-10/VSE 00-01 Troubleshooting infertility problems in cattle
This is a joint publication between Dairy and Animal Science and
Veterinary Science. This fact sheet examines problem areas with repeat
breeding, anestrus, cystic ovaries, reproductive tract infections,
abortions, retained placenta, difficult calvings, and heifer breeding
problems.
DAS 99-10 Storing and handling frozen semen
This Department of Dairy and Animal Science publication covers semen tank management, handling semen
within the tank, thawing semen, inseminating a group of synchronized
cattle, and additional pointers in handling semen.
DAS 03-62 Checklist for reproductive management
This Department of Dairy and Animal Sciencepublication replaces DAS 94-15; it contains checklists for
evaluating records, estrous detection, factors affecting conception,
and the nutrition program and feeding management.
DAS 92-106 Factors causing uterine infections in cattle
Topic areas in this Department of Dairy and Animal Science publication include nutritional factors, environment, calving
assistance, postpartum infusions, inaccurate heat detection, and
organisms.
This Department of Dairy and Animal Sciencepublication examines the advantages of AI, the use of AI for
heifers, the physiology related to synchronization programs, systems
for managing an AI program for heifers, and inseminating a group of
synchronized cattle.
DAS 98-5 Milk progesterone analysis for determining reproductive status
This fact sheet covers a lot of information on the subject of milk
progesterone. Topics included are physiology, uses of milk progesterone
analysis, evaluation of heat detection accuracy, determining pregnancy
status, monitoring ovarian status, tips for using milk progesterone
tests, and distributors of the tests.
