Lack of accuracy in estrus detection in cattle is a major constraint affecting the
implementation of techniques such as artificial insemination (AI) and embryo transfer (ET) …

The aim of this study was to determine whether an increase in circulating estrogen
concentrations would increase percentage pregnant per artificial insemination (PP/AI) in a …

Our objective of this study was to investigate the relationship between milk urea-nitrogen
concentrations ([MUN]) and first-service breeding success (FSBS) in a large number of …

The aim of this study was to investigate the effect of the interval between artificial
insemination and the onset of estrus on the sex ratio of offspring and fertility in Holstein …

Para conocer el comportamiento estral del bovino Chinampo se utilizaron 24 vacas
ciclando. Un grupo (GI) estuvo con un toro protegido con un mandil de tela para evitar la …

Our objective was to determine whether delaying the PGF2α injection by 24 or 48h after the
first GnRH injection in an Ovsynch protocol (from a standard 7 d) altered ovarian …

Intravaginal impedance (IVI) fluctuates during the goat estrous cycle. To understand which
ovarian steroids are responsible for IVI changes and whether IVI variations are associated …

Contents Thirty cyclic, non‐suckled Brahman cows were divided into three groups, all of
which were synchronized sequentially with CIDR‐B and observed continuously for 100 h to …

The effect of a contract breeding program offered by a breeding co-operative was assessed
using parametric frailty models with event-time analysis technique in a field study of Ohio …

Brunstkontrollen är den viktigaste skötselfaktorn för mjölkkornas fruktsamhet vid användning
av artificiell insemination. Effektiv brunstdetektion är viktigt för att hålla en hög …