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) …

The primary objective of this randomized controlled experiment was to evaluate the
insemination dynamic and reproductive performance of cows managed with a targeted …

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

Lactating dairy cows are classified as spontaneous ovulators, in which establishment of
pregnancy depends on the accuracy of detection of behavioral estrus for correct timing of …

The objectives of this study were to evaluate the effects of daily top-dressing (individually
feeding on the top of the total mixed ration) with rumen-protected methionine (RPM) from …

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

Simple Summary Twinning in dairy cattle is not desirable due to negative effects on both
cows that calve twins and calves born as twins that result in economic losses to dairy farms …

This review aimed to (1) summarize the results from fixed-timed artificial insemination (TAI)
fertility studies performed during the last 27 years;(2) compile and evaluate, as examples …

Our objective was to determine the effect of inducing an accessory corpus luteum (CL) with
human chorionic gonadotropin (hCG; 3,300 IU) on d 7 (hCG7) or 2 accessory CL with hCG …