Results 11 to 20 of about 370,507 (192)
Formation and function of sperm tail structures in association with sperm motility defects† [PDF]
Biology of Reproduction, 2017 Male infertility is an increasing problem partly due to inherited genetic variations. Mutations in genes involved in formation of the sperm tail cause motility defects and thus male infertility. Therefore, it is crucial to understand the protein networks required for sperm differentiation.
Lehti, Mari S., Sironen, Anu
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Structural specializations of the sperm tail. [PDF]
Cell, 2023 Sperm motility is crucial to reproductive success in sexually reproducing organisms. Impaired sperm movement causes male infertility, which is increasing globally. Sperm are powered by a microtubule-based molecular machine-the axoneme-but it is unclear how axonemal microtubules are ornamented to support motility in diverse fertilization environments ...
Leung MR +11 more
europepmc +6 more sources
Psychological and physiological adaptations to sperm competition in humans [PDF]
, 2005 Postcopulatory competition between males, in the form of sperm competition, is a widespread phenomenon in many animal species. The extent to which sperm competition has been an important selective pressure during human evolution remains controversial ...
Pound, N, Goetz, AT, Shackelford, TK
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, 2022 The project aims to measure and analyze the change of angle between cell and sperm cell during their interaction. The program allows interactively selecting the cell of interest to measure using napari Viewer. Requirements are specified in requirements.txt. Developed in IMCF in Biocev, Czech Republic.
Komrsková Kateřina +3 more
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International Brazilian Journal of Urology, 2015 Main findings: An intriguing yet perplexing case report of a successful pregnancy and live birth with intracytoplasmic sperm injection using normal testicular sperm, after the finding of azoospermia in the semen analysis and discovering only tail stump ...
Betina B. Povlsen +4 more
doaj +1 more source
Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates [PDF]
, 2007 Engqvist L, Reinhold K. Sperm competition games: optimal sperm allocation in response to the size of competing ejaculates. Proceedings of the Royal Society B.
Reinhold, Klaus +1 more
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Phenotypic plasticity in sperm traits in scorpionflies (Mecoptera: Panorpidae): consequences of larval history and seasonality on sperm length and sperm transfer [PDF]
, 2009 Vermeulen A, Engels S, Engqvist L, Sauer KP. Phenotypic plasticity in sperm traits in scorpionflies (Mecoptera: Panorpidae): consequences of larval history and seasonality on sperm length and sperm transfer. European Journal of Entomology.
Vermeulen, Andreas +8 more
core +1 more source
Cryopreservation of common carp sperm [PDF]
, 2003 Experiments were carried out to investigate the effect of five extenders (sucrose, glucose, fructose, KCl and a saline carp sperm extender) and two cryoprotectants (dimethyl-sulfoxide (DMSO) and methanol) on the cryopreservation of common carp sperm ...
Urbányi, Béla +5 more
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Journal of Animal Reproduction and Biotechnology, 2016 The recovery of epididymal sperm in animals is considered as one of the important tools to preserve high value or endangered species. However, there are no appropriate castrating indicators such as months of age in bull, sperm morphology, and motility ...
Sung-Sik Kang +11 more
doaj +1 more source
The coupling apparatus of the sperm head and tail†
Biology of Reproduction, 2020 AbstractA strong sperm head–tail coupling apparatus (HTCA) is needed to ensure the integrity of spermatozoa during their fierce competition to fertilize the egg. A lot of HTCA-specific components have evolved to strengthen the attachment of the tail to the implantation fossa at the sperm head.
Bingbing, Wu +3 more
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