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Alertys Milk Pregnancy Test

28 day pregnancy check run alongside your herd testing. Tick a box and let your herd testing centre do the rest!

When a cow becomes pregnant she produces pregnancy-associated glycoproteins (PAGs). These PAGs are only produced in the presence of a live embryo of fetus.

The Alertys Milk Pregnancy Test, very accurately detects these PAGs in the milk samples from cattle, goats, sheep and water buffaloes as a marker for pregnancy.

How the test works


Sample Collection


Milk is collected as part of your routine herd testing and can be done any time after 28 days of gestation










As part of routine herd testing, your samples can be tested for pregnancy specific proteins (PAG's), indicating if a cow is pregnant or not.

Trusted ELISA technology provides accurate results on par with palpation and ultrasound.

Results are reported by txt message, email or post showing which cows are not in calf, those that are and any that should be rechecked.

Is the test reliable?

  • The test is proven to be accurate as early as 28 days after insemination 

  • Already more than 30 million tests performed worldwide


% of accurate results on pregnant cows



% of accurate results on non pregnant cows



(Level of PAGs is in between pregnant and non pregnant)


of the total

What does a re-check result mean?


  • It is a sample containing a small quantity of gestation proteins (the vial contains too many PAGs to confirm the cow is non-pregnant but not enough to confirm that she is pregnant).

  • If the farmer received a re-check result, a sample needs to be taken again from the cow at a later date to rerun the test.

Several possible causes:


  • A cow sampled too early: < 28 days from AI or < 60 days from lactation 


  • A cow that has just aborted: 8 days are required to become negative if the cow aborts at around 30-50 days. 

What are the benefits?


With just a few drops of milk received at the lab you could:


Find open cows as early as 28 days post-insemination


Confirm pregnancy status throughout gestation


Take appropriate action immediately, from as early as 28 days


Improve reproductive management and performance

Overall benefits of the Alertys Milk Pregnancy Test

  • Informed dry off decisions 

  • Apart of routine herd testing 

  • Less stress for the farmer

  • Improved animal welfare 

  • Reduced costs

  • Beneficial anytime during gestation 

  • Detect embryo losses

  • Prevent culling of pregnant cows

AGFIRST Indepentent Assessment

Agfirst test.png

"We were very impressed by what we saw, and will be discussing this as an option to consider with our clients"

Benefits to consider:


  • Reported accuracy equal or greater than rectal scanning

  • Process is non invasive, and there is no additional. workload - it is part of the normal herd testing process.

  • Opportunity to re-check the herd (or individual cows) at the end of lactation.

Click on this PDF to access the 2020 Assessment Report

AGFIRST Waikato (2016) Ltd -- IDEXX Milk Pregnancy Test Assessment 

Want to sign up to the Alertys Milk Pregnancy Test Today?

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