Herdbook Services
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American Simmental Association

Herdbook Online Services


--handling registrations, transfers, THE, data entry, data lookup 


Don't forget, you still have until August 15 to update your 2024 Fall Total Herd Enrollment!

The June 15 THE early enrollment deadline has passed, but it's not too late to update your inventory. If you are an active THE herd with dams calving between July 1 and December 31 make sure your inventory is accurate. Don't pay for dams that are gone. Sumbit your updated THE enrollment by the final deadline - August 15! ($1.00 late fee per dam will apply.)


Previously enrolled herds, login to Herdbook to start your enrollment today:


  • 1) Go to "Data Entry" and select "Online"

  • 2) From the "Inventory" tab make sure "Fall" is selected and "2024" shows in the drop down menu

  • 3) In the box "2024 - Fall THE Enrollment" select "Update Cow Inventory Online"


See the April Register for instructions on how to udpate and submit your 2024 Fall THE enrollment.


If you are not currently enrolled in THE click here to learn more about how THE can help you improve your herd's performance. The THE team is eager to help you find the best fit for your herd. Email them at the@simmgene.com to help you get started.

* Fall 2023 THE calf data is due by August 15th!

If you were enrolled in 2023 Fall THE, each dam enrolled must have a calf reported to her. Calves do not need to be registered. If a dam did not calve, a productivity code, explaining why she did not calve, must be used.


If the reporting requirement is not met by August 15th, your account will be considered non-compliant and you will not be able to process any registrations/transfers until the data is submitted.


Please click on this link for instructions.

Updates to Be Made to the IGS Growth and Carcass Evaluations


Three evaluations within the IGS genetic evaluation will undergo updates at the end of November. As the IGS genetic evaluation has grown and expanded from historical partners, as well as the addition of new partners, the ability to run genetic evaluations within a week’s time frame has become difficult. One of the main goals of these updates was to increase the efficiency of evaluations; however, these upgrades are also to maintain or improve the accuracy of prediction of each evaluation. To read the full update from the IGS Science Team and to learn more about what can be expected, click here.

Link tohttps://www.internationalgeneticsolutions.com/site/#announcements

Hydrops Pregnancies in Simmentals

The Nebraska Bovine Congenital Defects program recently recognized an increased number of reports of hydrops pregnancies in a line of Simmental cows. Hydrops is expressed by females developing markedly enlarged abdomens in late pregnancy due to a dramatic excess fluid in the fetal membranes. At present, these cases point to a genetic link but the pattern of inheritance and percent of affected offspring is unknown. Reports involve daughters and granddaughters of the bull WS All Aboard B80, ASA #2852207. For the most up-to-date information, to report a case, or to watch the informational webinar, please visit https://www.simmental.org/site/index.php/hydrops-pregnancy.

* 2022 Year-Letter is "K", 2023 is "L"

In accordance with the Beef Improvement Federation (BIF) guidelines, the year-letter animal identifications are:

  • 2021 - J

  • 2022 - K

  • 2023 - L

  • 2024 - M

  • 2025 - N


Per the BIF guidelines, the following letters are not used: "I", "O", "Q", & "V".

* Registering an animal of another Breed - Foundation Registration

If you are registering an animal out of a sire of another breed, this sire must be registered in another breed association and then registered with ASA as a foundation animal.

If you are registering an animal out of a cow of another breed that is registered in another breed association, the animal will have a more complete pedigree and EPDs if the cow is registered with ASA as a foundation animal.

There is information on registering foundation animals here.

* Avoid processing delays! Required tests for sires and donor - 

All bulls with semen collected and donor cows must have a high density DNA SNP analysis. In addition all sires and donor cows with a carrier in their lineage (CL, DL) or who come from a risk population (PR) for specified genetic defects must be tested for that defect before registration certificates and EPDs are available on new progeny. Please plan ahead; tests can take from 4 to 8 weeks. No testing is required on dams of natural calves. More..


--------------------Instructions for Herdbook Services -------------------------


  1. Log in by choosing that option from options tab in the top bar. Have your member/account number and password available. If you are not a member of the Association, you can create an account from the Log In page to have access to more search features.

  2. Registrations, transfers, calf records and THE enrollments can be done under `Data Entry` after log in.

  3. Choose Online from `Data Entry` to enter data through the web site. You can preload animals or start with an empty spreadsheet of rows and columns. Each row represents 1 animal and the columns represent specific data on the animal. When you select (click on) a column heading, information about the column is displayed. The tabs immediately above the spreadsheet are used to change the column headings for entering (or viewing) additional data.

  4. Choose Download from `Data Entry` to get a form to enter this information off line using Excel to upload at a later time. Choose Upload when the Excel file is complete and data is ready to send to ASA.

  5. To display EPD and pedigree information choose `Animal Search` under `Data Search`. Choose `EPD Search` to search the database for animals meeting specified EPD and other criteria.

  6. `Reports` under `Herd Mgmt` provides calf crop summaries and more. You can also create you own groups and reports.

  7. Please call (406-587-4531) or email simmental@simmgene.com if you have questions or comments.

American Simmental Association
One Genetics Way
Bozeman, Montana 59718 U.S.A.

Phone: 406-587-4531
Fax: 406-587-9301
Email: simmental@simmgene.com


  1. ASA Home

  2. Registrations/Animal Data

  3. Foundation (other Breed) Reg

  4. Simmental Percentage Chart

  5. Standard Codes

  6. THE Codes

  7. Fees/Billing Worksheet

  8. ASA Deadline-Time Table

  9. Monitoring Genetic Defects

  10. Percentile Tables

  11. DNA Accuracy Calculator

  12. Forms