The aim of this study was to determine if estrous expression, as measured by an automated
activity monitor (AAM), affects timing and failure of ovulation of lactating Holstein dairy cows …

Reproduction in domestic animals is under control by man and the technologies developed
to facilitate that control have a major impact on the efficiency of food production …

In cattle artificial insemination plays not only a vital role in the successful establishment of
pregnancy, which is a prerequisite for initiation of the subsequent lactation, but also in …

During the last decade, Australian dairy farmers have been challenged to increase total
factor productivity (the ratio between the rate of increase in total output and the rate of …

An experiment was designed to compare fertility of SexedULTRA 4M™ sex-sorted semen
and conventional, non-sex-sorted semen following either fixed-time artificial insemination …

Background Pregnancy loss is a major source of infertility in dairy cows. Despite a
fertilization rate after insemination (AI) of approximately 90%, calving rates are 30%–50 …

Estrous behavior and time of ovulation relative to the onset of estrus were determined in
mature Angus× Hereford cows (n= 17 to 21 each season) during summer, winter, and spring …

This study aimed to evaluate the effectiveness of estrous detection technique based on
continuous measurements of vaginal temperature (VT) and conductivity (VC) with …

Ovulation to the first GnRH (G1) treatment of the Ovsynch protocol improves synchronization
rate and pregnancies per AI (P/AI). Elevated progesterone (P4) concentrations at G1 …

The aim of this study was to determine the relationship between observed estrous-related
behavior, activity clusters (AC; detected by automatic activity monitor), endocrine profiles …