Age at 1st calving

This page contains historic and up-to-date information about the gestation length trait, which is currently included on 2 ICBF selection indexes: the beef replacement (calf) index and beef terminal index.

Terminal index
The economic value for beef heifer and cow calving difficulty on terminal index is calculated the same way as for the replacement calf index.

Instructions for making changes
When updating an existing traits follow these steps:
 * 1) In the table above, for the appropriate index, add a new row. Update the date and EV, and add a brief reason for the update and new method.
 * 2) Upload key documents, and link to these in the "source" section of the table.
 * 3) Update  the current trait information on the appropriate index page.
 * 4) Also link to key documents here, this time at the bottom of the page.
 * 5) Update the trait on the  index overview section of the main page.
 * 6) Finally, update the introduction section of the main page, where it states "This wiki was last updated on DATE by WHOM (ORGANISATION).