Results 11 to 20 of about 63,070 (266)

Efecto del reemplazo folicular (GnRH) y de somatotropina bovina (bST) sobre la fertilidad de vacas lecheras expuestas a estrés calórico

open access: yesRevista Mexicana de Ciencias Pecuarias, 2020
Tres protocolos reproductivos fueron evaluados: 1) PG: inyección de PGF2α en el día 50 posparto e inseminación (IA) en base a detección del estro. 2) OVS (Ovsynch: día 0, GnRH; día 7, PGF2α; día 9, GnRH; día 10, IA); y 3) ROV (GnRH + Ovsynch: día- 7 ...
Renato Raúl Lozano-Domínguez   +7 more
doaj   +1 more source

Efficiency of Two Protocols of Resynchronization of Estrus and Ovulation in High-Producing Dairy Cows at Peak Lactation

open access: yesActa Veterinaria, 2022
The reproductive efficiency of the cows was monitored after two resynchronization protocols: Ovsynch (OVS) and Double Ovsynch (DOS). The research initially included 70 HF cows who entered the first synchronization protocol – Presynch.
Đorđević Milan   +6 more
doaj   +1 more source

Estrus synchronization protocols for fixed-time artificial insemination (FTAI) during non-breeding season in ewes [PDF]

open access: yesJournal of Central European Agriculture
This study aimed to compare three protocols used for induction and estrus synchronization followed by fixed-time artificial insemination (FTAI) during the non-breeding season in anestrous Cluj Merino ewes.
Alexandru DEAC   +7 more
doaj   +1 more source

Physiology and modulation factors of ovulation in rabbit reproduction management

open access: yesWorld Rabbit Science, 2021
Rabbit is an induced ovulatory species, so ovulation takes place after mating. Traditionally, exogenous and synthetic hormonal factors (administered by intramuscular and intravaginal route) such as GnRH and analogues, or different physical procedures (i ...
Simona Mattioli   +7 more
doaj   +1 more source

COMPARATIVE STUDY OF USE SOMETREATMENTAL REGIMES TOTREAT POSTPARTUM FUNCTIONAL INFERTILITY OF COWS IN BASRA [PDF]

open access: yesBasrah Journal of Veterinary Research, 2019
Postpartum an estrus in cows is regarded as one of the most important causes of functional infertility after parturition during reproductive lifespan. Therefor the present study was conducted to induce fertile estrus in anestrus cows which suffered from ...
doaj   +1 more source

GnRH agonist triggering: recent developments [PDF]

open access: yesReproductive BioMedicine Online, 2013
The concept that a bolus of gonadotrophin-releasing hormone agonist (GnRHa) can replace human chorionic gonadotrophin(HCG) as a trigger of final oocyte maturation was introduced several years ago. Recent developments in the area strengthen this premise.
Kol, Shahar   +2 more
openaire   +4 more sources

A role for GABA agonist in controlling the reproduction of female rats via hypothalamic ghrelin, kisspeptin, and RFRP-3 gene expression [PDF]

open access: yesThe Iranian Journal of Veterinary Science and Technology, 2021
Kisspeptin stimulates gonadotropin releasing hormone (GnRH). The GnRH neurons receive inhibitory inputs from ghrelin, RFamide related peptide-3 (RFRP-3), and gamma-aminobutyric acid (GABA) neurons.
Elaheh Rahimi Rick   +4 more
doaj   +1 more source

Reaction of Cows Ovaries to GnRH Administration in Different Estrous Stages

open access: yesScientific Papers Animal Science and Biotechnologies, 2023
Administration of GnRH in the luteal phase of estrous in dairy cows induces an increase of LH levels, with the modification of the growth waves of the ovarian follicles.
Casiana Ciolac Șipețan   +12 more
doaj  

Hormonal Regulation of Glucocorticoid Inactivation and Reactivation in αT3-1 and LβT2 Gonadotroph Cells

open access: yesBiology, 2019
The regulation of reproductive function by glucocorticoids occurs at all levels of the hypothalamo-pituitary-gonadal axis. Within the pituitary, glucocorticoids have been shown to directly alter gene expression in gonadotrophs, indicating that these cell
Anthony E. Michael   +2 more
doaj   +1 more source

Evaluation of testicular hemodynamics following gonadotropin-releasing hormone administration with the aid of pulse wave Doppler in rams and their relation to hormonal response

open access: yesSVU-International Journal of Veterinary Sciences, 2021
The vascularization of the testis through testicular artery is of great importance to maintain its normal function. The vascular disruption due to inadequate arterial blood flow of the testis negatively affects testicular function and semen quality ...
Mohammed Rawy   +3 more
doaj   +1 more source

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