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 …

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 …

This study evaluated the influence of GnRH analogs (gonadorelin vs. buserelin) and doses
(single vs. double) on LH release and ovulatory response in Bos indicus (Nelore) females …

One strategy for improving fertility in cattle is administration of GnRH or human chorionic
gonadotropin (hCG) during the luteal phase, which increases progesterone (P4) secretion …

Our objectives were to evaluate ovarian dynamics and fertility comparing 2 treatments at the
start of a progesterone (P4)-based fixed-time artificial insemination (FTAI) protocol and 2 …

Three experiments evaluated ovarian dynamics and circulating progesterone (P4) during P4-
based protocols initiated with GnRH, estradiol benzoate (EB), or no additional treatment in …

The development of an ovulatory follicle is a fundamental premise for any reproductive
management program that aims to optimize fertility in cattle. Controlling follicular …

The present study compared 2 strategies to initiate a progesterone (P4)-based timed
artificial insemination (TAI) protocol for lactating dairy cows: only GnRH or estradiol …

In cattle, early diestrus progesterone (P4) supplementation modulates endometrial function
to exert pro-and anti-pregnancy establishment effects; specifically, P4 stimulates conceptus …

The treatment of cystic ovarian disease (COD) in dairy cows is still controversial, and some
researchers recommend using gonadotropin-releasing hormone (GnRH) regardless of the …