What should your AI conception rate be?

Published on: 08/23/2016
Author/s : Ray Nebel, PhD. / V.P. Tech Services Programs, Select Sires Inc.

During the past 50 years that AI has been practiced in the U.S. the fertility of virgin heifers has remained relatively constant at approximately 65% first service conception; whereas, the first service conception rate for lactating cows has decreased approximately 33% from 60 to 40%. Conception per insemination is the outcome resulting from a multitude of factors that interact in an intricate fas...

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donapaty donapaty
Veterinary Doctor
August 23, 2016

What would be the Human factors influence and their relative percentage effects ? Would you care to comment Dr ?

SR Donapaty BVSc MVSc PhD ECFVG

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Fredrick Karanja Mirara Fredrick Karanja Mirara
Dairy producer
August 24, 2016
What is the most accurate method of detecting a heifer on heat? I have a major problem of this and the result is AI failure. Another one what is the safest method of checking early pregnancy one to three months? Thanks.
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August 30, 2016
What is the most accurate method of detecting a heifer on heat? I have a major problem of this and the result is AI failure. Another one what is the safest method of checking early pregnancy one to three months? Thanks.
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August 30, 2016

Visual inspection for "standing" to be mounted by a herdmate is the most accurate method of heat detection. Recommendation is a minimum of two 30 minute observation periods once the the AM and once in the PM. Insemination using the AM/PM guideline works well for heifers.

Pregnancy diagnosis: Earlier than 35 days post breeding ultrasound scanning, After 35 days ultrasound is best but an experience training individual rectal palpation is very effective.

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