Results 21 to 30 of about 165,252 (194)

Nejire/dCBP-mediated control of H3 acetylation and transcriptional regulation by testis-specific Plus3 domain proteins during Drosophila spermatogenesis [PDF]

open access: yes, 2018
Spermatogenesis describes the development from germ line stem cells to highly specialized sperm. Drosophila melanogaster spermatogenesis is a good model system for chromatin remodelling processes as many of these processes are similar in mammals and in ...
Hundertmark, Tim
core   +1 more source

[Varicocele testis].

open access: yesUgeskrift for laeger, 2021
In this review, we discuss varicocele testis, which is found in 15% of men from the general population, but more frequently in infertile populations. It can cause physical symptoms or impaired fertility. Varicocele severity is graded 1-3 by clinical examination, and increasing grade is associated with poorer semen quality.
Joensen, Ulla Nordstrëm   +4 more
openaire   +3 more sources

Evidence for a GABAergic system in rodent and human testis: Local GABA production and GABA receptors [PDF]

open access: yes, 2003
The major neurotransmitter of the central nervous system, gamma-aminobutyric acid (GABA), exerts its actions through GABA(A), GABA(B) and GABA(C) receptors.
Calandra, Ricardo S.   +7 more
core   +2 more sources

Role of androgen and gonadotrophins in the development and function of the Sertoli cells and Leydig cells: data from mutant and genetically modified mice [PDF]

open access: yes, 2009
Development and maintenance of the male phenotype and establishment of fertility are all dependent upon the activity of the Sertoli cells and Leydig cells of the testis.
Abel, M.H.   +4 more
core   +1 more source

Effect of competitive cues on reproductive morphology and behavioral plasticity in male fruitflies [PDF]

open access: yes, 2015
Phenotypic plasticity will be favored whenever there are significant fitness benefits of responding to environmental variation. The extent and nature of the plasticity that evolves depends on the rate of environmental fluctuations and the capacity to ...
Bretman, Amanda   +3 more
core   +1 more source

Sperm competition and sperm midpiece size: no consistent pattern in passerine birds [PDF]

open access: yes, 2007
Sperm competition is thought to be a major force driving the evolution of sperm shape and function. However, previous studies investigating the relationship between the risk of sperm competition and sperm morphometry revealed inconclusive results and ...
Birkhead T.R   +3 more
core   +2 more sources

TORSION OF THE TESTIS

open access: yesMedical Journal of Australia, 1966
Abstract A series of 56 proved cases of torsion of the testis is reviewed. The condition is rare, only 2 patients per year being admitted to a large general hospital of 800 beds. The aim of this study was to assess the fate of testes in relation to the duration of symptoms: if less than 12 hours the outlook is good, between 12 and 24 ...
openaire   +5 more sources

Testes asymmetry, condition and sexual selection in birds: an experimental test [PDF]

open access: yes, 1998
The functional significance of the marked directional asymmetry in testes size observed in many bird species is obscure. Møller suggested that (i) the smaller of the two testes serves a compensatory role and increases in size (and hence reduces ...
Birkhead, T.R.   +2 more
core   +2 more sources

Gestational and lactational exposure of rats to xenoestrogens results in reduced testicular size and sperm production [PDF]

open access: yes, 1995
EHP is a publication of the U.S. government. Publication of EHP lies in the public domain and is therefore without copyright. Research articles from EHP may be used freely; however, articles from the News section of EHP may contain photographs or ...
Albro P   +8 more
core   +2 more sources

SEASONAL INCIDENCE OF CAPTURE AND REPRODUCTION OF FIVE FOSSORIAL SNAKE SPECIES IN WEST VIRGINIA [PDF]

open access: yes, 2017
Museum specimens of five species of fossorial snakes collected in West Virginia during 1930–2000 were examined to determine monthly incidence of capture, adult body sizes, reproductive cycle, and clutch characteristics.
Herrick, Kelli-Marie   +3 more
core   +2 more sources

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