Results 31 to 40 of about 2,944,740 (334)

Effects of season and single layer centrifugation on bull sperm quality in Thailand [PDF]

open access: yesAsian-Australasian Journal of Animal Sciences, 2020
Objective The aim of study was to investigate the effects of season and single layer centrifugation (SLC) before cryopreservation on post-thaw bull sperm quality in Thailand.
Thanapol Nongbua   +5 more
doaj   +1 more source

Sperm design and variation in the New World blackbirds (Icteridae) [PDF]

open access: yes, 2009
Post-copulatory sexual selection (PCSS) is thought to be one of the evolutionary forces responsible for the rapid and divergent evolution of sperm design. However, whereas in some taxa particular sperm traits are positively associated with PCSS, in other
AF Malo   +81 more
core   +2 more sources

Comparative analysis of mammalian sperm ultrastructure reveals relationships between sperm morphology, mitochondrial functions and motility

open access: yesReproductive Biology and Endocrinology, 2019
BackgroundSperm morphology mainly refers to the shape of the head, the length of the flagellar segments, including the midpiece, principal piece and end piece, and the size of the accessory structures, including axonemes, outer dense fibers (ODFs ...
Nihao Gu   +3 more
semanticscholar   +1 more source

Comparison of Special Stains for Analysing the Morphology of Sperm: A Cross-sectional Study [PDF]

open access: yesNational Journal of Laboratory Medicine
Introduction: In India, male infertility constitutes 40% of infertility cases in males, which has become a serious problem in developing countries. Numerous studies and advanced techniques have been identified in assessing sperm morphology. The detection
Preethi Murali   +2 more
doaj   +1 more source

The Effect of X-Rays on Cytological Traits of Tuta absoluta (Lepidoptera: Gelechiidae) [PDF]

open access: yes, 2016
The tomato leafminer, Tuta absoluta (Meyrick) (Lepidoptera: Gelechiidae) is one of the most important pests of tomato. With the purpose of developing environmentally friendly control tactics such as the inherited sterility (IS) technique against this ...
Cagnotti, Cynthia Lorena   +5 more
core   +1 more source

DNA fragmentation index (DFI) as a measure of sperm quality and fertility in mice. [PDF]

open access: yes, 2020
Although thousands of genetically modified mouse strains have been cryopreserved by sperm freezing, the likelihood of cryorecovery success cannot be accurately predicted using conventional sperm parameters.
Li, Ming-Wen, Lloyd, KC Kent
core   +1 more source

Sperm chromatin dispersion test before sperm preparation is predictive of clinical pregnancy in cases of unexplained infertility treated with intrauterine insemination and induction with clomiphene citrate [PDF]

open access: yes, 2016
Background/aims: A large proportion of men with normal sperm results as analyzed using conventional techniques have fragmented DNA in their spermatozoa.
De Croo, Ilse   +4 more
core   +2 more sources

Body mass index and age correlate with antioxidant supplementation effects on sperm quality: Post hoc analyses from a double-blind placebo-controlled trial [PDF]

open access: yes, 2020
Spermatozoa are vulnerable to lack of energy and oxidative stress as a result of elevated levels of reactive oxygen species. Therefore, it is essential that appropriate nutrients are available during maturation.
Agarwal, Ashok   +9 more
core   +1 more source

Sperm Morphology and Male Age in Black-Throated Blue Warblers, an Ecological Model System

open access: yesAnimals, 2020
Extra-pair paternity may drive selection on spermatozoa and ejaculate characteristics through sperm competition and cryptic female choice. Here, we examine sperm morphology in the black-throated blue warbler (Setophaga caerulescens), an ecological model ...
Emily Cramer   +3 more
doaj   +1 more source

Automatic detection of spermatozoa for laser capture microdissection [PDF]

open access: yes, 2008
In sexual assault crimes, differential extraction of spermatozoa from vaginal swab smears is often ineffective, especially when only a few spermatozoa are present in an overwhelming amount of epithelial cells.
Deforce, Dieter   +3 more
core   +2 more sources

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