The discovery of progesterone (P4) and elucidation of the mechanisms of P4 action have an
important place in the history of endocrinology and reproduction. Circulating P4 …

Timed-AI after synchronization of ovulation has become one of the most used reproductive
technologies developed during the past 40 years. Various adaptations of this technology are …

The objective of this study was to determine the effects of subclinical hypocalcemia on
reproductive performance in dairy cows. In a prospective cohort study, 97 cows on 2 dairy …

The objectives of this study were to identify factors associated with concentrations of anti-
Müllerian hormone (AMH) in plasma of dairy cows and to investigate the relationships …

The main objective of this study was to evaluate the effect of a second treatment with
prostaglandin F 2α (PGF) during Ovsynch on regression of the corpus luteum (CL) and on …

Our objective is to overview the research that lead to the development of fertility programs for
high-producing lactating dairy cows using only GnRH and Prostaglandin F 2α (PGF 2α) …

This manuscript reviews the effect of progesterone (P4) during timed AI protocols in lactating
dairy cows. Circulating P4 is determined by a balance between P4 production, primarily by …

The objective was to determine if using a Double-Ovsynch protocol [DO; Pre-Resynch:
GnRH–7 d–PGF2α–3 d–GnRH, 7 d later Breeding-Resynch: GnRH–7 d–PGF2α–56 h …

Reproductive efficiency is not optimal in high-producing dairy cows. Although many aspects
of ovarian follicular growth in cows are similar to those observed in heifers, there are …

Ovsynch-type synchronization of ovulation protocols have suboptimal synchronization rates
due to reduced ovulation to the first GnRH treatment and inadequate luteolysis to the …