Since bull fertility may be adversely affected by hot humid conditions, the current increase in
global temperature is of concern for future livestock production. Heat stress occurs when the …

In the current era of genomic selection, there is an increased demand to collect semen from
genomically selected sires at a young age. The objective of this study was to assess the …

Rising temperatures caused by climate change have adverse effects on cattle physiology,
welfare, health, and reproduction. Heat stress in cows affects the oocyte and embryo directly …

In this paper, the potentials and constraints on estrus synchronization (ES) and artificial
insemination (AI) practice for dairy cattle producers were overviewed. Compared to other …

An association between sperm DNA integrity and fertility was recently shown for frozen–
thawed Norwegian Red (NRF) bull semen diluted in skimmed milk egg yolk (SMEY). In …

The purpose of this study was to estimate environmental effects on semen production of
artificial insemination (AI) Holstein bulls managed under Moroccan conditions. A total of 4 …

Sperm viability is routinely assessed for the quality control of cryopreserved bovine sperm
batches but is not usually conclusive regarding their fertilizing potential. In this study, we …

The objectives of the study were to estimate pregnancy incidence and calving rate after first
artificial insemination (AI) in Norwegian Red cows undergoing spontaneous estrus, to …

Cows become fail to conceive with various factors including management failures, nutritional
status, postpartum reproductive health, semen quality and other miscellaneous factor and …

Heat stress dramatically decreases bull sperm quality and has recently received more
attention due to the warmer global climate and more intensive production. However, no data …