About Milk Pregnancy Testing

Dairy One offers milk pregnancy testing for cows and goats. The use of milk as a medium for pregnancy testing allows you to receive more data from the samples you are already submitting for component testing.

How does it work?
Developed by IDEXX Laboratories, one of the world’s leading diagnostic testing manufacturers, the test works by detecting Pregnancy Associated Glycoproteins (PAGs), which are only present in a pregnant animal. The test is 98% accurate, with false-negatives being exceptionally rare. For more information on IDEXX Milk Pregnancy Test performance and sensitivity, please refer to the Validation Data Report.

What animals are eligible for this test?
Animals can be tested as early as 28 days post breeding and 60 days after giving birth. While most of the milk pregnancy samples that the laboratory receives are sampled during regular component testing intervals, samples can be submitted at any time by ordering a milk pregnancy strip-sample test kit from Dairy One’s supply department.  See “Submitting Samples” section below.

How do I start testing?
If your herd is already testing with Dairy One, let your technician know that you would like samples submitted for pregnancy testing.

If you are not on a DHIA testing program with Dairy One, please contact our Supply Department at 800.344.2697, ext. 7, to set up an account and order supplies.

What are my testing options?

Test Day Samples
Individual DHIA samples can also be submitted for milk pregnancy testing.

If your milk samples have already been collected and you decide to test for milk pregnancy, please contact us as soon as possible at 800.344.2697 ext 4.

Between Test Days: Strip-Sample Testing
Strip samples from individual cows can be submitted between test days and shipped to the lab. Test kits are available from the Dairy One Supply Department.

Milk Pregnancy Test Kits
Test kits with 50 pre-preserved vials, shipping envelopes, and preprinted UPS labels can be ordered through the Supply Department via e-mail at supply@dairyone.com or via phone at 800.344.2697, ext. 7. The cost of the kit is $10.00.

Shipping Samples
Dairy One provides free shipping when farms submit 10 or more samples for analysis at one time using Dairy One milk pregnancy test kits. Samples can be sent on the Dairy One Sample Transportation System or via UPS using the preprinted labels in the kit.

Samples do not need to be refrigerated when shipped, but for best results refrigerate them during the time between sample collection and shipping.

Sample Submission Form
Click here to download a PDF version of the Sample Submission Form.

How do I receive results?
All results are sent via the US Postal Service (USPS). We will also send results via e-mail if an address is provided. Your technician will receive an email with results.  Results are also automatically downloaded to Dairy Comp.

When can I expect to receive results?
The lab tests milk pregnancy samples Monday through Friday with the exception of major holidays, and also usually tests on either Saturday or Sunday.

Once your samples arrive at the lab, you can generally expect the testing to be completed within 24 hours. If your herd is also being tested for other components in the milk lab, your pregnancy samples usually arrive in the Animal Health Diagnostics lab either on the same day or the next day.

If you do not receive your results, please contact us via phone Monday through Friday, 8:00 am through 4:00 pm, at 800-344-2697, or via e-mail at ahd@dairyone.com. We may need to update our records with a current mailing address or e-mail address.

How do I interpret the results?
A “Pregnant” result indicates that the animal is pregnant. An “Open” results indicates that the animal is not pregnant. While most milk pregnancy results provide a “Positive” or “Open” result, a small number of samples cannot provide a definitive answer as to whether or not the animal is pregnant, resulting in a “Recheck” result. A “Recheck” result indicates that the animal may be experiencing a loss of pregnancy.

Dairy One does not charge for any test that has a “Recheck” result, as long as the sample was taken in accordance with the manufacturer’s label. Eligible animals currently must be at least 60 days in milk after giving birth, and 28 days post breeding.

What is the cost per test?
The test costs $4.50 per sample. There is no charge for “Recheck” results.

When will I be billed?
Milk pregnancy test billing usually occurs once per week.