Impact of Accessory Corpus Luteum Induced by Gonadotropin-Releasing Hormone or Human Chorionic Gonadotropin on Pregnancy Rates of Dairy Cattle following …

F Chen, Y Hou, X Zhu, C Mei, R Guo, Z Shi - Veterinary Sciences, 2023 - mdpi.com
Simple Summary In recent decades, embryo transfer in dairy cows has been widely applied,
and improving the conception rate after embryo transfer has become a major challenge in …

[HTML][HTML] Graduate Student Literature Review: Effects of human chorionic gonadotropin on follicular and luteal dynamics and fertility in cattle

TO Cunha, JPN Martins - Journal of Dairy Science, 2022 - Elsevier
Circulating progesterone concentrations during the growth of the ovulatory follicle and early
embryo development have been positively associated with embryo quality and survival and …

[HTML][HTML] Accessory corpus luteum induced by human chorionic gonadotropin on day 7 or days 7 and 13 of the estrous cycle affected follicular and luteal dynamics and …

TO Cunha, LR Statz, RR Domingues… - Journal of Dairy …, 2022 - Elsevier
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 …

[HTML][HTML] Time to increase in pregnancy-specific protein B following artificial insemination is a direct determinant of subsequent pregnancy loss in lactating dairy cows

A Santos, T Minela, J Branen, JR Pursley - Journal of Dairy Science, 2023 - Elsevier
Increasing progesterone (P4) during early conceptus development may be crucial for
establishment of pregnancy in dairy cattle. The objective of this study was to determine if …

[HTML][HTML] Evaluation of treatment with human chorionic gonadotropin at transfer of in vitro–produced beef embryos on reproductive outcomes in lactating multiparous …

N Hincapie, MR Lauber, T Valdes-Arciniega… - Journal of Dairy …, 2024 - Elsevier
Our objective was to evaluate the effect of treatment with human chorionic gonadotropin
(hCG) at the time of transfer of in vitro–produced (IVP) beef embryos on pregnancy …

Effects of GnRH and hCG administration during early luteal phase on estrous cycle length, expression of estrus and fertility in lactating dairy cows

TO Cunha, W Martinez, E Walleser, JPN Martins - Theriogenology, 2021 - Elsevier
Our objective was to determine the effects of a single treatment of human chorionic
gonadotropin (hCG) or GnRH from d 5 to 7 of the estrous cycle on cycle length, expression …

[HTML][HTML] Replacing the first gonadotropin-releasing hormone treatment in an Ovsynch protocol with human chorionic gonadotropin decreased pregnancies per artificial …

EM Cabrera, MR Lauber, T Valdes-Arciniega… - Journal of Dairy …, 2021 - Elsevier
Our objective was to compare the effect of treatment with GnRH at the first treatment (G1) of
the Breeding-Ovsynch portion of a Double-Ovsynch (DO) protocol with human chorionic …

Evaluation of hCG as gonadotropic support to timed embryo transfer protocol in beef cattle

EA de Almeida Rossignolo, NC da Silva, RL Stolf… - Theriogenology, 2023 - Elsevier
This study compared the reproductive performance of embryo recipients treated with a timed
embryo transfer (TET) protocol using human chorionic gonadotropin (hCG) or equine …

[HTML][HTML] Effect of inducing accessory corpus luteum formation with gonadotropin-releasing hormone or human chorionic gonadotropin on the day of embryo transfer on …

MS El Azzi, JL Cardoso, RA Landeo, JHF Pontes… - JDS communications, 2023 - Elsevier
The objective was to determine the effect of inducing an accessory corpus luteum (CL) using
GnRH or human chorionic gonadotropin (hCG) on the day of in vitro-produced (IVP) embryo …

Interval from Oestrus to Ovulation in Dairy Cows—A Key Factor for Insemination Time: A Review

F De Rensis, E Dall'Olio, GM Gnemmi, P Tummaruk… - Veterinary …, 2024 - mdpi.com
Simple Summary This review delves into the oestrus-to-ovulation interval, the potential for
ovulation time prediction, and the optimal timing for insemination in dairy cows. Typically …