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 …

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) …

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 …

The objective of this study was to compare the economic outcome of reproductive programs
using estrus detection (ED), timed artificial insemination (TAI), or a combination of both (TAI …

Important developments have occurred in the last two decades, since the advent of the
Ovsynch protocol, on the understanding and use of synchronisation programmes for …

A systematic review of the literature was performed with the objective to evaluate the effects
of progesterone supplementation using a single intravaginal insert during timed artificial …

Objectives were to determine the effects of GnRH at the initiation of the 5-d timed artificial
insemination (AI) program combined with 2 injections of PGF 2α on ovarian responses and …

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 …