Results 21 to 30 of about 29,881 (260)

Sincronização da onda folicular com hCG prévia à indução da luteólise com cloprostenol em bovinos Follicular wave synchronization with hCG prior the luteolisis induction with cloprostenol in cattle

Revista Brasileira de Zootecnia, 1999
O efeito da aplicação de diferentes doses de hCG sobre a emergência de nova onda de crescimento folicular e o número de folículos recrutados dessa onda, a formação de corpo lúteo acessório, o diâmetro do folículo dominante e do corpo lúteo espontâneo no ...
Deiler Sampaio Costa, Ciro Alexandre Alves Torres, Libardo A. Maza Angulo, Luiz Arthur C. Junqueira, Luciano Andrade Silva   +4 more
doaj   +1 more source

Follicular dynamics in zebu cattle [PDF]

Pesquisa Agropecuária Brasileira, 2000
The aim of this study was to investigate the follicular dynamics during estrous cycle in Gir breed (Bos indicus) cows. Follicular growth and atresia during estrous cycle were evaluated using a portable ultrasound device. Luteal activity was evaluated by serum progesterone levels.
VIANA, JOÃO HENRIQUE MOREIRA, FERREIRA, ADEMIR DE MORAES, SÁ, WANDERLEI FERREIRA DE, CAMARGO, LUIZ SÉRGIO DE ALMEIDA   +3 more
openaire   +4 more sources

Characterization of preantral follicle clustering and neighborhood patterns in the equine ovary.

PLoS ONE, 2022
Understanding the transition from quiescent primordial follicles to activated primary follicles is vital for characterizing ovarian folliculogenesis and improving assisted reproductive techniques.
Kendall A Hyde, Francisco L N Aguiar, Paula B Alvarenga, Amanda L Rezende, Benner G Alves, Kele A Alves, Gustavo D A Gastal, Melba O Gastal, Eduardo L Gastal   +8 more
doaj   +2 more sources

Sincronização da onda folicular com buserelina prévia à indução da luteólise com cloprostenol em bovinos Follicular wave synchronization with buserelin before the luteolisis induction with cloprostenol in cattle

Revista Brasileira de Zootecnia, 1999
Este experimento foi realizado para verificar o efeito da aplicação de diferentes doses de um análogo de GnRH (buserelina) sobre a emergência de nova onda de crescimento folicular e o número de folículos recrutados dessa onda, a formação de corpo lúteo ...
Deiler Sampaio Costa, Ciro Alexandre Alves Torres, Carlos Antônio de Carvalho Fernandes, Luiz Arthur C. Junqueira, Cláudia D'avila de Almeida, Sandro Campos Alvim   +5 more
doaj   +1 more source

Preantral follicle population and distribution in the horse ovary

Reproduction and Fertility, 2022
Characterization of the ovarian preantral follicle population is a necessary step to improve understanding of folliculogenesis and ovarian physiology. Therefore, in the present study, the preantral follicle population in the equine ovary in young and old
Kendall A Hyde, Francisco L N Aguiar, Benner G Alves, Kele A Alves, Gustavo D A Gastal, Melba O Gastal, Eduardo L Gastal   +6 more
doaj   +1 more source

Desenvolvimento folicular no pós-parto de vacas da raça Gir tratadas com acetato de buserelina (GnRH) ou gonadotrofina coriônica humana (hCG) Follicular development in Gir breed cows (Bos indicus) treated with buserelin acetate or human chorionic gonadotrophin during the postpartum period

Revista Brasileira de Zootecnia, 2004
Foram utilizadas 22 vacas da raça Gir (Bos indicus) em anestro pós-parto, amamentando e mantidas sob regime de pastejo. O padrão de crescimento folicular foi estudado em 15 animais, enquanto os outros sete foram utilizados somente no acompanhamento da ...
Álan Maia Borges, Ciro Alexandre Alves Torres, Vicente Ribeiro Rocha Júnior, José Reinaldo Mendes Ruas, Giovanni Ribeiro de Carvalho, Alberto Marcatti Neto, Bruno de Campos Carvalho   +6 more
doaj   +1 more source

Menstrual Cycle Effects on Exercise-Induced Fatigability

Frontiers in Physiology, 2020
Estrogen and progesterone have distinct concentrations across the menstrual cycle, each one promoting several physiological alterations other than preparing the uterus for pregnancy.
Hugo M. Pereira, Rebecca D. Larson, Debra A. Bemben   +2 more
doaj   +1 more source

MicroRNA-338-3p helps regulate ovarian function by affecting granulosa cell function and early follicular development

Journal of Ovarian Research, 2023
Background Follicular development in mammalian ovaries is a complex and dynamic process, and the interactions and regulatory-feedback loop between the follicular microenvironment, granulosa cells (GCs), and oocytes can affect follicular development and ...
Ziwen Xu, Tongwei Zhang, Jingyi Hu, Junya Zhang, Guang Yang, Jiahuan He, Huihui Wang, Ran Jiang, Guidong Yao   +8 more
doaj   +1 more source

Ovarian follicular dynamics during anoestrus in ewes [PDF]

Reproduction, 1998
Abstract The aim of the present study was to document ovarian antral follicle dynamics throughout seasonal anoestrus in sheep. Daily transrectal ultrasonography was performed during four 17 day scanning periods from March to July in Western White-faced crossbred ewes.
P M, Bartlewski, A P, Beard, S J, Cook, N C, Rawlings   +3 more
openaire   +2 more sources

Gonadotropin-Releasing Hormone (GnRH) and Its Agonists in Bovine Reproduction I: Structure, Biosynthesis, Physiological Effects, and Its Role in Estrous Synchronization

Animals
GnRH is essential for the regulation of mammalian reproductive processes. It regulates the production and release of pituitary gonadotropins, thereby influencing steroidogenesis and gametogenesis.
Eman M. Hassanein, Zoltán Szelényi, Ottó Szenci   +2 more
doaj   +1 more source