The impact of sanity on the fertility of cows submitted to reproductive biotechnics

Amanda Fonseca Zangirolamo,Marcelo Marcondes Seneda,Nathalia Covre Da Silva,Fábio Morotti

doi:10.7213/academica.15.s02.2017.a09

Amanda Fonseca Zangirolamo, Marcelo Marcondes Seneda + Show 2 more

Open Access

https://doi.org/10.7213/academica.15.s02.2017.a09

Copy DOI

Abstract

The productivity in the herds is directly associated with reproduction. Thus, in order to achieve a better efficiency, the most varied reproductive biotechniques have been applied to the plants. Several factors have a direct influence on reproductive performance, including genetics, nutrition, zootechnical management, and sanitation. However, the sanity of the herd through the use of prophylactic measures against infectious agents is often neglected. In this context, particular attention should be paid to health programs, since 37-50% of gestational losses in the herd are consequences of infectious diseases of the reproductive tract caused by viral, bacterial or protozoan agents. Thus, this review will discuss the main advantages obtained with the use of reproductive biotechniques to increase fertility and the epidemiological aspects related to the diseases that cause reproductive failures in cows. Finally, we will also explain the importance of implementing sanitary programs with adequate management and vaccination of animals, to minimize economic losses related to reproductive diseases and, consequently, obtain higher pregnancy rates in the use of reproduction biotechnologies.

Highlights

In Brazil, the cattle breeding is one of the main highlights of agribusiness being responsible for important and profitable segments in the meat and milk production chain
90% of the oocytes recovered by OPU reach metaphase II with the expulsion of the first polar corpuscle when passing through the in vitro maturation (IVM) stage
Many strategies are applied in Brazil and in other countries to correct factors related to genetics, zootechnical management, and herd nutrition

Summary

Introduction

In Brazil, the cattle breeding is one of the main highlights of agribusiness being responsible for important and profitable segments in the meat and milk production chain. In order to keep cattle breeding on the rise, investment has become increasingly necessary in the means of breeding and production of these animals In this way, new technologies developed for the improvement in the field have gained their application on a large scale, aiming the genetic improvement, zootechnical indexes with high productive and reproductive efficiency of the herd. New technologies developed for the improvement in the field have gained their application on a large scale, aiming the genetic improvement, zootechnical indexes with high productive and reproductive efficiency of the herd These improvements include animal breeding biotechnology, such as protocols for timed artificial insemination (TAI), superovulation of donors for collection and transfer of embryos (SOV/TE), in vitro embryos production (IVEP), cryopreservation of gametes and embryos and, sexed semen (Rufino et al, 2006; Vieira, 2012). The sexed semen decreases the number of receptors necessary to achieve the desired amount of females born from embryos produced in vitro

Reproductive diseases of the cow and fertility

Viral diseases

Bacterial diseases

Parasitic diseases

Findings

Importance of sanitary management to avoid economic losses