Abstract
The reproductive efficiency in beef cattle breeding herds is one of the aspects of greater highlight for the financial success of the investment. In the present revision the main parameters used to evaluate the reproductive performance of cows in extensive management will be approached, as well as the more important infectious causes of the reproductive failures that affect the costs of the production.

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.
Copyright (c) 2006 José R. C. Junqueira, Amauri A. Alfieri
