Simple Summary Reproductive efficiency is critical for profitability of dairy operations. The
first part of this manuscript discusses the key physiology of dairy cows and how to practically …

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) …

Resumption of ovulation after parturition is a coordinated process that involves recoupling of
the GH/insulin-like growth factor 1 axis in the liver, increase in follicular development and …

As the reproductive efficiency of dairy cattle continues to improve in response to better
management and use of technology, novel reproductive management approaches will be …

The objective of this randomized controlled experiment was to evaluate the effect of
reproductive management programs that prioritized artificial insemination (AI) at detected …

The objective of this experiment was to determine the effect of high versus low progesterone
(P4) during the pre-dominance or dominance phase (or both) of ovulatory follicle …

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 …

An experiment was conducted with the objective to determine the effects of estradiol,
progesterone, presence of a corpus luteum (CL), and size of a dominant follicle on the …

Our objective was to evaluate the effect of a second PGF 2α treatment and duration of an
Ovsynch protocol that included a progesterone-releasing intravaginal device (PRID) on …

Overall pregnancy risk of lactating dairy cows in North America has decreased since the
1950s, 1 whereas annual milk yield per cow has increased nearly 4-fold from 5313 to …