Background A retrospective cohort study using a 10 year artificial insemination (AI) and cow
reproductive performance data was conducted to study the success rate of AI; associations …

This study was aimed at determining the median days of calving to conception interval (days
open) and identifying the major risk factors determining the days open in dairy cows. Both …

Objective We determined the risk factors limiting first service conception (FSC) rate in dairy
cows and their economic impact. Methods Data were collected from 790 lactations regarding …

The aim of the study was to evaluate the effect of extended voluntary waiting period (VWP)
on ovarian cyclicity and reproductive performance of dairy cows. Holstein-Friesian dairy …

The purpose of the research was to compare economically useful traits of Holstein cows of
different selections. The results show that the German and Australian selections were …

There are numerous recent studies highlighting sustainability problems for the development
of ruminant production systems (RPS) while facing increasing human food necessities and …

The objective of this study was to conduct a meta-analysis to quantitatively characterize the
effects of mastitis on the reproductive performance of dairy cows as well as to identify factors …

A retrospective study was carried out to evaluate the reproductive performance of Holstein–
Friesian cattle in Alage Dairy Farm in the Rift Valley of Ethiopia using data recorded from …

Artificial insemination (AI) is the first and the most used biotechnologies in reproduction all
over the world. Many studies reported the beneficial role of gonadotropin-releasing hormone …

Current study was aimed to investigate effect of retained fetal membrane on the
concentration of some biochemical parameters and liver enzymes in cows. Total forty five …