Results 31 to 40 of about 8,546 (233)

Anti-Müllerian hormone concentration and scrotal circumference as predictors of fertility-linked characteristics in male Brahman and Simmental bulls [PDF]

Revista Brasileira de Zootecnia
This study investigates whether pre-pubertal scrotal circumference (SC) and anti-Müllerian hormone (AMH) concentrations indicate sexual precocity in Brahman and Simmental bulls. Fifty-three bulls (Brahman, n = 27; Simmental, n = 26) were used.
Renata Maculan, Jesús Alfonso Sánchez Viafara, Gisvani Lopes de Vasconcelos, Gabriel Miranda Moreira, Cintia Vanin Ribeiro, Nathália Alves, Marcos Brandão Dias Ferreira, José Camisão de Souza   +7 more
doaj   +1 more source

Can scrotal circumference-based selection discard bulls with good productive and reproductive potential? [PDF]

PLoS ONE, 2018
Nonlinear mixed models were used to describe longitudinal scrotal circumference (SC) measurements of Nellore bulls. Models comparisons were based on Akaike's information criterion, Bayesian information criterion, error sum of squares, adjusted R2 and ...
Jurandy Mauro Penitente-Filho, Faider Alberto Castaño Villadiego, Fabyano Fonseca E Silva, Breno Soares Camilo, Victor Gomez León, Thiago Peixoto, Edgar Díaz, Denise Okano, Paula Maitan, Daniel Lima, Simone Facioni Guimarães, Jeanne Broch Siqueira, Rogério Pinho, José Domingos Guimarães   +13 more
doaj   +1 more source

Testes and brain gene expression in precocious male and adult maturing Atlantic salmon (Salmo salar) [PDF]

, 2010
The electronic version of this article is the complete one and can be found online at: http://www.biomedcentral.com/1471-2164/11/211peer-reviewedBackground: The male Atlantic salmon generally matures in fresh water upon returning after one or several ...
Aoife Guiry, Denis Flynn, Sophie Hubert, Allan M O'Keeffe, Olivier LeProvost, Samantha L White, Patrick F Forde, Pamela Davoren, Benoit Houeix, Terry J Smith, Deirdre Cotter, Noel P Wilkins, Michael T Cairns   +12 more
core   +1 more source

Pelvic Ultrasound in Diagnosing and Evaluating the Efficacy of Gonadotropin-Releasing Hormone Agonist Therapy in Girls With Idiopathic Central Precocious Puberty

Frontiers in Pharmacology, 2019
Background and Objective: Idiopathic central precocious puberty (ICPP) is characterized by early pubertal changes, the acceleration of growth velocity, and rapid bone maturation that often results in reduced adult height.
Hong-kui Yu, Hong-kui Yu, Xiao Liu, Jia-kun Chen, Shan Wang, Xian-yue Quan   +5 more
doaj   +1 more source

Estimativas de herdabilidade para idade ao primeiro parto de novilhas da raça Nelore Heritability estimates for age at first calving in Nelore cattle

Revista Brasileira de Zootecnia, 2004
Estimaram-se parâmetros genéticos para idade ao primeiro parto (IPP) de, aproximadamente, 6.000 novilhas, utilizando-se três diferentes definições de grupo contemporâneo (GC).
Laila Talarico Dias, Lenira El Faro, Lúcia Galvão de Albuquerque   +2 more
doaj   +1 more source

Relationship between polymorphism of growth hormone and precocity traits in Nellore heifers [PDF]

, 2011
Avaliaram-se as relações entre o polimorfismo do gene do hormônio do crescimento (GH) e as características de precocidade, em novilhas da raça Nelore.
ANDREA, M.V, FONTELES, S.B, GOMES, M.V.M, MARCONDES, C.R, OLIVEIRA, K.N, RAMOS, E.S   +5 more
core   +3 more sources

Efeito da idade de exposição de novilhas à reprodução sobre estimativas de herdabilidade da idade ao primeiro parto em bovinos Nelore Effect of age of exposure of heifers to reproduction on heritability estimates for age at first calving in Nelore cattle

Arquivo Brasileiro de Medicina Veterinária e Zootecnia, 2004
Estimou-se a herdabilidade da idade ao primeiro parto (IPP) a partir de quatro conjuntos com diferentes tipos de informação. A primeira estimativa (IPP1) foi realizada com as novilhas (n= 6.222) expostas apenas na estação "normal", ou seja, aos 24 meses ...
L.T. Dias, L. EL Faro, L.G. Albuquerque
doaj   +1 more source

Genetic relationship between growth and reproductive traits in Nellore cattle

Animal, 2012
The objective of this study was to evaluate the genetic relationship between postweaning weight gain (PWG), heifer pregnancy (HP), scrotal circumference (SC) at 18 months of age, stayability at 6 years of age (STAY) and finishing visual score at 18 ...
M.L. Santana, Jr, J.P. Eler, J.B.S. Ferraz, E.C. Mattos   +3 more
doaj   +1 more source

Endocrine disruptors and abnormalities of pubertal development [PDF]

, 2008
Onset and development of puberty is regulated by the neuroendocrine system. Population-based studies worldwide have observed secular trends towards earlier puberty development. These changes are apparently caused by environmental factors such as improved
Adair, Adair, Berg-Kelly, Blanck, Colon, DeCastro, Den Hond, Den Hond, Dunger, Gamba, Gladen, Gore, Grumbach, Guo, Hertz-Picciotto, Ibanez, Kaya, Klein, Krstevska-Konstantinova, Kubo, Kuhl, Lebrethon, Lee, Legler, Levine, Levy, Lewis, Marshall, Marshall, McKee, McLachlan, Mol, Naftolin, Ohtake, Parent, Patton, Petroff, Proos, Ramirez, Rasier, Rockett, Roselli, Rubin, Safe, Sagiv, Saiyed, Selevan, Singh, Skynner, Staessen, Styne, Teilmann, Tena-Sempere, Tena-Sempere, Terasawa, Traggiai, Vasiliu, Vinggaard, Wade, Warner, Wu, Wu, Zeinoaldini   +62 more
core   +2 more sources

Descriptive Epidemiology From the Myhre Syndrome Foundation Registry: The Value of Self‐Reported Data

American Journal of Medical Genetics Part C: Seminars in Medical Genetics, EarlyView.
ABSTRACT Myhre syndrome is an ultrarare genetic disease characterized by short stature, distinct craniofacial features, cardiovascular and respiratory fibrosis and stenosis, neurodevelopmental delays, autism, intellectual disability, and hearing loss. The natural history of Myhre syndrome is still not fully understood due to a small patient population ...
Mary K. Young, Armelle Pindon, Maggie R. Brand, Kate Wears, Katherine H. Young, Alyssa Mendel, Michael J. Lyons   +6 more
wiley   +1 more source