Methods for estrus detection and related failures

Abstract

This paper seeks a better understanding of the accurate detection of estrus, which is a limiting factor in reproductive efficiency of dairy cattle and is considered one of the major deficiencies in bovine reproduction. The biggest difficulty lies in the practice of artificial insemination is the detection of estrus so that causes a decrease in conception rate and thus increase the period of service. The low percentage of animals detected in estrus, in some cases, due to the absence of ovarian activity, but in most cases the main factor is the inefficiency in estrus detection, which is one of the biggest barriers to achieving satisfactory rates in artificial insemination programs. Recognition of signs of estrus for choosing the most appropriate method and timing of mating is a priority task in the creation of livestock due to its influence pregnancy rate, calving interval and thus the reproductive efficiency of breeding.