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 …

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 …

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 …

Current knowledge about the function of the reproductive tract and appropriate use of
hormonal drugs affords control of the oestrus cycle of cows. One of the hormonal protocols is …

Ovulation to the first GnRH injection of Ovsynch-type protocols is lower in cows with high
progesterone (P4) concentrations compared with cows with low P4 concentrations …

Basic knowledge of mechanisms controlling reproductive processes in mammals was
limited in the early 20th century. Discoveries of physiologic processes and mechanisms …

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 …

Sixteen herds were selected from a pool of 64 herds nominated by consultants for
participation in a national survey to demonstrate excellence in reproductive performance …

Abstract Lactating Holstein cows (n= 897) were randomly assigned to a 2× 2 factorial
arrangement of treatments to compare the main effects of presynchronization with GnRH 6 d …

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 …