Background There is speculation that beef bull semen quality is inferior to that of dairy bulls
although few scientific studies are available in the literature. The aim of this study was to …

The sex of the animals is of paramount importance in many animal production systems. This
is particularly evident in the production of milk or in breeding programs focused on the …

Two experiments in Nelore cows subjected to timed artificial insemination (TAI) were
designed to compare the influence of the antral follicle count (AFC/AFCs) on (1) ovarian …

We evaluated the effect of the antral follicle count (AFC) on ovarian follicular dynamics,
pregnancy rates, progesterone concentrations, and transcriptional patterns of genes in …

An experiment was performed to evaluate the association between the antral follicle count
(AFC) plus body condition score (BCS) and the pregnancy rate in Bos indicus undergoing …

We performed two experiments in high milk-producing Holstein cows. First, we evaluated the
repeatability of the antral follicle count (AFC)–where all follicles were≥ 2 mm in diameter …

This study aimed to validate a 7 d progesterone (P4)-based fixed-time AI (FTAI) protocol for
Bos indicus cattle by comparing to 8 and 9 d-type protocols. The first study compared 7 vs. 8 …

The use of tail chalk and estrus/heat expression scores (HEATSC) evaluation is instrumental
in identifying cows with greater estrus expression and greater artificial insemination …

Several studies have shown that cows displaying estrus before timed artificial insemination
(TAI) are more likely to become pregnant. However, the most frequently used ovulation …

The objectives of this study were to evaluate whether the diameter of the preovulatory follicle
and the post-thaw sperm kinematics are factors that affect successful establishment of a …