The cow as an induced ovulator: Timed AI after synchronization of ovulation

MC Wiltbank, JR Pursley - Theriogenology, 2014 - Elsevier
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 …

[HTML][HTML] Prohibition of hormones in animal reproduction: what to expect and what to do?

GA Bó, A Menchaca - Animal Reproduction, 2023 - SciELO Brasil
As our understanding of ovarian function in cattle has improved, our ability to control it has
also increased. The development of Fixed-Time Artificial Insemination (FTAI) protocols at the …

Ovarian follicular dynamics and conception rate in Bos indicus cows with different antral follicle counts subjected to timed artificial insemination

F Morotti, R Moretti, GMG Dos Santos… - Animal Reproduction …, 2018 - Elsevier
Two experiments in Nelore cows subjected to timed artificial insemination (TAI) were
designed to compare the influence of the antral follicle count (AFC/AFCs) on (1) ovarian …

[HTML][HTML] Effect of progesterone from corpus luteum, intravaginal implant, or both on luteinizing hormone release, ovulatory response, and subsequent luteal …

LO e Silva, NP Folchini, RLOR Alves, G Madureira… - Journal of Dairy …, 2023 - Elsevier
This study aimed to determine the effect of circulating progesterone (P4) concentrations
produced by a corpus luteum (CL) or released by an intravaginal P4 implant (IPI) on GnRH …

[HTML][HTML] Evolution of knowledge on ovarian physiology and its contribution to the widespread application of reproductive biotechnologies in South American cattle

RJ Mapletoft, GA Bó, PS Baruselli… - Animal …, 2018 - ncbi.nlm.nih.gov
As our understanding of ovarian function in cattle has improved, our ability to control it has
also increased. Luteal function in cattle has been studied in detail, and prostaglandin F2α …

Timed artificial insemination plus heat I: effect of estrus expression scores on pregnancy of cows subjected to progesterone–estradiol-based protocols

E Nogueira, MR Silva, JCB Silva, UPG Abreu… - Animal, 2019 - cambridge.org
Expression of estrus near timed artificial insemination (TAI) is associated with greater fertility,
and estrus detection could improve TAI fertility or direct TAI management, although accurate …

Resynchronization with unknown pregnancy status using progestin-based timed artificial insemination protocol in beef cattle

MF Sá Filho, MO Marques, R Girotto, FA Santos… - Theriogenology, 2014 - Elsevier
Two experiments were designed to evaluate the use of resynchronization (RESYNCH)
protocols using a progestin-based timed artificial insemination (TAI) protocol in beef cattle. In …

Hormonal combinations aiming to improve reproductive outcomes of Bos indicus cows submitted to estradiol/progesterone-based timed AI protocols

RLOR Alves, MA Silva, CEC Consentini, LO e Silva… - Theriogenology, 2021 - Elsevier
The aim was to study reproductive outcomes of Nelore (Bos indicus) cows submitted to a 7-d
estradiol (E2)/progesterone (P4)-based timed artificial insemination (TAI) protocol, receiving …

Effects of eCG are more pronounced in primiparous than multiparous Bos indicus cows submitted to a timed artificial insemination protocol

JNS Sales, MP Bottino, L Silva, RW Girotto… - Theriogenology, 2016 - Elsevier
The effects of eCG on follicular growth, ovulation, and pregnancy per artificial insemination
(P/AI) in multiparous and primiparous Bos indicus beef cows submitted to timed artificial …

Progesterone-based timed AI protocols for Bos indicus cattle I: evaluation of ovarian function

G Madureira, JCL Motta, JN Drum, CEC Consentini… - Theriogenology, 2020 - Elsevier
Three experiments evaluated ovarian dynamics and circulating progesterone (P4) during P4-
based protocols initiated with GnRH, estradiol benzoate (EB), or no additional treatment in …