Influence of GnRH analog and dose on LH release and ovulatory response in Bos indicus heifers and cows on day seven of the estrous cycle

LO e Silva, JCL Motta, AL Oliva, G Madureira… - Theriogenology, 2024 - Elsevier
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 …

[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 …

Progesterone release profile and follicular development in Holstein cows receiving intravaginal progesterone devices

LO e Silva, A Valenza, RLOR Alves, MA da Silva… - Theriogenology, 2021 - Elsevier
The aim of this study was to evaluate the progesterone (P4) release profile provided by eight
commercial intravaginal P4 devices, as well as the effect of circulating P4 concentrations …

Downregulated luteolytic pathways in the transcriptome of early pregnancy bovine corpus luteum are mimicked by interferon-tau in vitro

R Basavaraja, JN Drum, J Sapuleni, L Bibi… - BMC genomics, 2021 - Springer
Background Maintenance of the corpus luteum (CL) beyond the time of luteolysis is
essential for establishing pregnancy. Identifying the distinct features of early pregnancy CL …

[HTML][HTML] Follicular dynamics, circulating progesterone, and fertility in Holstein cows synchronized with reused intravaginal progesterone implants that were sanitized by …

LF Melo, PLJ Monteiro Jr, AB Nascimento… - Journal of dairy …, 2018 - Elsevier
This experiment aimed to compare circulating progesterone (P4), follicular dynamics, and
fertility during reuse of intravaginal P4 implants that were sanitized by autoclave or chemical …

Progesterone release profile and follicular development in Nelore cows receiving intravaginal progesterone devices

LO e Silva, A Valenza, RLOR Alves, M Silvestri… - Theriogenology, 2022 - Elsevier
This study aimed to evaluate the progesterone (P4) release profile provided by four
commercially available intravaginal P4 devices, as well as the effect of circulating P4 …

LRH‐A3 and HCG increase pregnancy rate during timed artificial insemination in dairy cows

P Zheng, H Huang, X Li, F Huang… - Animal Science …, 2021 - Wiley Online Library
The objective of this study was to use luteinizing hormone‐releasing hormone A3 (LRH‐A3)
and human chorionic gonadotrophin (HCG) to improve pregnancy rate of dairy cows during …

Optimization of a 5-day fixed-time embryo transfer (FTET) protocol in heifers I. Manipulation of circulating progesterone through reutilization of intravaginal …

RV Sala, LF Melo, JCL Motta, L Leffers-Neto… - Theriogenology, 2020 - Elsevier
The objectives of the present study were to: 1) compare the reproductive efficiency of
embryo transfer (ET) recipients after synchronization of estrus or a 5-day synchronization of …

Development of a novel 21-day reinsemination program, ReBreed21, in Bos indicus heifers

JPN Andrade, VE Gomez-León, FS Andrade… - Theriogenology, 2020 - Elsevier
The aim was to develop a program for resynchronization of ovulation (ReBreed21) that
allowed reinsemination of non-pregnant Bos indicus heifers every 21 d using timed AI (TAI) …

Fertility in dairy cows treated in the early luteal phase with a reused progesterone-releasing intravaginal device

G Meneses Arias, F Rivera Acuña… - Veterinaria México …, 2022 - scielo.org.mx
In this study, we tested whether early luteal phase treatment with a previously used
progesterone-releasing intravaginal device (DIV) increased conception rate (CR) in dairy …