Beef heifer & cow calving difficulty (direct)

This page contains historic and up-to-date information about the heifer and cow calving difficulty (direct) trait, which is currently included on 3 ICBF selection indexes: the beef replacement index (calf sub-index), the  beef terminal index, and the  dairy-beef index.

18 July comments (logged): add discussion of sexed semen increasing rate of gain?

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 trait follow these steps:
 * 1) For the appropriate index, add a new row to the table above. Update the EV, date, and add a brief reason for the update and new method.
 * 2) Upload any key documentation related to the trait, and link to this in the "source" section of the new row.
 * 3) Update the current trait information on the appropriate index page. Link to the up-to-date source here also.
 * 4) Update the trait on the  index overview section of the main page.