Results 21 to 30 of about 370,507 (192)
Frontiers in Cell and Developmental Biology, 2019 Terminal differentiation of male germ cells into functional spermatozoa requires shaping and condensation of the nucleus as well as the formation of sperm-specific structures. A transient microtubular structure, the manchette, is mandatory for sperm head
Constanza Tapia Contreras +1 more
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Variation in apical hook length reflects the intensity of sperm competition in murine rodents. [PDF]
PLoS ONE, 2013 BackgroundPost-copulatory sexual selection has been shown to shape morphology of male gametes. Both directional and stabilizing selection on sperm phenotype have been documented in vertebrates in response to sexual promiscuity.MethodologyHere we ...
Martin Šandera +2 more
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Scientific Reports, 2021 Sperm cells can move at a high speed in biofluids based on the flexible flagella, which inspire novel flagellar micro-/nanorobots to be designed. Despite progress in fabricating sperm-type robots at micro scale, mass fabrication of vivid sperm-like ...
Nuoer Celi, De Gong, Jun Cai
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CRISPs Function to Boost Sperm Power Output and Motility
Frontiers in Cell and Developmental Biology, 2021 Fertilization requires sperm to travel long distances through the complex environment of the female reproductive tract. Despite the strong association between poor motility and infertility, the kinetics of sperm tail movement and the role individual ...
Avinash S. Gaikwad +11 more
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Qualitative defects with normal sperm counts in a patient attending infertility clinic
Indian Journal of Pathology and Microbiology, 2018 Background: Sperm morphology is an important qualitative parameter in semen analysis. Aim: To assess qualitative defects in the semen with normal sperm counts.
Rachna Goyal +3 more
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Di-san junyi daxue xuebao, 2021 Objective To investigate the association between exposure to polycyclic aromatic hydrocarbons(PAHs) in atmospheric fine particulate matter(PM2.5) and sperm DNA damage in Chongqing.
ZHOU Niya, ZHOU Niya, CHEN Qing
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Hydrodynamic propulsion of human sperm [PDF]
, 2009 The detailed fluid mechanics of sperm propulsion are fundamental to our understanding of reproduction. In this paper, we aim to model a human sperm swimming in a microscope slide chamber.
Green, Richard B. +7 more
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PLoS Genetics, 2020 Approximately 2-15% of couples experience infertility, and around half of these cases are attributed to male infertility. We previously identified TBC1D21 as a sterility-related RabGAP gene derived from infertile men.
Ya-Yun Wang +7 more
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Essential Role of CFAP53 in Sperm Flagellum Biogenesis
Frontiers in Cell and Developmental Biology, 2021 The sperm flagellum is essential for male fertility. Despite vigorous research progress toward understanding the pathogenesis of flagellum-related diseases, much remains unknown about the mechanisms underlying the flagellum biogenesis itself.
Bingbing Wu +33 more
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Irradiation of Sperm Tails by Laser Microbeam* [PDF]
Journal of Experimental Biology, 1969 ABSTRACT Sea-urchin and starfish sperm tails were irradiated at pre-selected points along the flagellum and at pre-selected phases of the beat cycle by means of a pulsed ruby laser microbeam. Multiple-exposure dark-field photomicrographs were taken immediately before and after irradiation.
openaire +2 more sources