Veterinary Reproductive Programs

Abstract

Reproduction influences farm gross income about 10%. Gross margin per cow is maximized when herd pregnancy rate (pregnancy efficiency) is above 30%. Pregnancy rate (PR) is calculated as the heat detection rate (HDR) times the conception rate (CR). Since CR is typically below 40% on most farms, HDR needs to be above 80% to achieve a PR above 30%.

Herd reproductive programs are most effective when they are used to control HDR. Furthermore, first insemination heat detection rates have a higher economic value than repeat heat detection rates. Synchronization programs using prostaglandin alone or in combination with GnRH have a high potential return for producers to improve reproductive efficiency. Synchronization programs have value on dairy farms as they control HDR, improve labor efficiency for insemination, and coordinate veterinary activities for pregnancy examination on a scheduled basis.