Uterine inflammation and fertility of beef cows subjected to timed AI at different days postpartum

The aim of this study was to evaluate the uterine health and fertility of postpartum beef cows subjected to timed AI (TAI) protocols at different days from calving. Lactating Nelore cows (Bos indicus; n = 244) were used in this study. The TAI protocols were initiated between 20 and 60 days postpartu...

Full description

Saved in:
Bibliographic Details
Published in:Animal reproduction science 2018-10, Vol.197, p.268-277
Main Authors: Machado Pfeifer, Luiz Francisco, de Souza Andrade, Jéssica, Moreira, Elizângela Mírian, Reis da Silva, Renata, Araújo Neves, Paulo Marcos, Moreira da Silva, George, Lemos, Izabela Cristina, Schneider, Augusto
Format: Article
Language:English
Subjects:
Animals
Calving
Cattle
Cattle Diseases - physiopathology
Cytobrush
Cytokines
Estrus Synchronization
Female
Fertility - physiology
Inflammation - physiopathology
Inflammation - veterinary
Insemination, Artificial - methods
Insemination, Artificial - veterinary
Lactation
PMN cell
Postpartum Period
Pregnancy
Progesterone
Uterine Diseases - physiopathology
Uterine Diseases - veterinary
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The aim of this study was to evaluate the uterine health and fertility of postpartum beef cows subjected to timed AI (TAI) protocols at different days from calving. Lactating Nelore cows (Bos indicus; n = 244) were used in this study. The TAI protocols were initiated between 20 and 60 days postpartum (DPP). Cows were subjected to an estradiol-progesterone based TAI protocol. The cows were divided into three groups according to the days postpartum at the time the hormonal treatment was initiated: 1) Early (n = 64), cows between 20 and 30 DPP; 2) Middle (n = 115), cows between 31 and 45 DPP; and 3) Late (n = 65), cows between 46 and 60 DPP. At Day 0 of the protocol, endometrial cytobrush samples were collected. Slides for polymorphonuclear (PMN) cell counting were prepared and cytobrush was used for RNA extraction and analysis of relative abundance of il1, il6, il8, and tnf mRNA. Cows from the Early group had less (P 
ISSN:0378-4320
1873-2232
DOI:10.1016/j.anireprosci.2018.08.039