Results 71 to 80 of about 129,478 (220)
Reproductive Biology and Endocrinology, 2009 Background Externalization of phosphatidylserine (EPS) occurs in apoptotic-like spermatozoa and could be used to remove them from sperm preparations to enhance sperm quality for assisted medical procreation.
de Agostini Ariane +3 more
doaj +1 more source
Travelling waves are hydrodynamically optimal for long-wavelength flagella [PDF]
arXiv, 2020 Swimming eukaryotic microorganisms such as spermatozoa, algae and ciliates self-propel in viscous fluids using travelling wave-like deformations of slender appendages called flagella. Waves are predominant because Purcell's scallop theorem precludes time-reversible kinematics for locomotion.
arxiv
Proceedings of the National Academy of Sciences of the United States of America, 2011 To fuse with oocytes, spermatozoa of eutherian mammals must pass through extracellular coats, the cumulus cell layer, and the zona pellucida (ZP). It is generally believed that the acrosome reaction (AR) of spermatozoa, essential for zona penetration and
M. Jin +7 more
semanticscholar +1 more source
Surface accumulation of spermatozoa: a fluid dynamic phenomenon [PDF]
The Mathematical Scientist, vol. 34, no. 2, pp. 74-87 (2009), 2010 Recent mathematical fluid dynamics models have shed light into an outstanding problem in reproductive biology: why do spermatozoa cells show a 'preference' for swimming near to surfaces? In this paper we review quantitative approaches to the problem, originating with the classic paper of Lord Rothschild in 1963. A recent 'boundary integral/slender body
arxiv
CD5 expression by human ejaculated spermatozoa
Middle East Fertility Society Journal, 2022 Background A complex of effector and predominant regulatory immune responses are induced in the female reproductive tract (FRT) due to insemination that is necessary to achieve pregnancy.
Nasrin Sereshki +4 more
doaj +1 more source
Jurnal Ternak Tropika, 2012 ABSTRAK Penyimpanan semen bisa dilakukan dengan pendinginan atau pembekuan. Setelah pendinginan atau pembekuan viabilitas spermatozoa akan menurun.
Nurul Isnaini
doaj
Jurnal Sain Veteriner, 2017 Cauda epididymal spermatozoa could be used as an alternative source of gamete in the application of various reproductive technologies, since the spermatozoa is motile and has ability for fertilizing the oocyte.
Muhammad Rizal +4 more
doaj +1 more source
Expression of TEX101, regulated by ACE, is essential for the production of fertile mouse spermatozoa
Proceedings of the National Academy of Sciences of the United States of America, 2013 Formation of spermatozoa of normal shape, number, and motility is insufficient for the male siring of pups. The spermatozoa must be accompanied by sound fertilizing ability.
Yoshitaka Fujihara +6 more
semanticscholar +1 more source
Hydrodynamic Impedance Correction for Reduced-Order Modeling and Real-Time Control of Spermatozoa-Like Soft Micro-Robots for Medicine [PDF]
arXiv, 2018 Hydrodynamic interactions play a key role in the swimming behavior and power consumption of bio-inspired and bio-mimetic micro-swimmers, Cybernetic or artificial alike. As micro-robotic devices, bio-inspired micro-swimmers require fast and reliable numerical models for robust control in order to carry out demanding therapeutic tasks as envisaged for ...
arxiv
High spatially sensitive quantitative phase imaging assisted with deep neural network for classification of human spermatozoa under stressed condition [PDF]
arXiv, 2020 Sperm cell motility and morphology observed under the bright field microscopy are the only criteria for selecting particular sperm cell during Intracytoplasmic Sperm Injection (ICSI) procedure of Assisted Reproductive Technology (ART). Several factors such as, oxidative stress, cryopreservation, heat, smoking and alcohol consumption, are negatively ...
arxiv