Results 41 to 50 of about 46,516 (173)
Axonemal regulation by curvature explains sperm flagellar waveform modulation [PDF]
arXiv, 2022 Flagellar motility is critical to natural and many forms of assisted reproduction. Rhythmic beating and wave propagation by the flagellum propels sperm through fluid and enables modulation between penetrative progressive motion, activated side-to-side yaw and hyperactivated motility associated with detachment from epithelial binding.
arxiv
A Machine Learning Framework for Automatic Prediction of Human Semen Motility [PDF]
arXiv, 2021 In this paper, human semen samples from the visem dataset collected by the Simula Research Laboratory are automatically assessed with machine learning methods for their quality in respect to sperm motility. Several regression models are trained to automatically predict the percentage (0 to 100) of progressive, non-progressive, and immotile spermatozoa ...
arxiv
Protective Effect of L-Carnitine on the Sperm Parameters of Adult Mice Treated with Ciprofloxacin
Journal of Ardabil University of Medical Sciences, 2018 Background & objectives: The present study examined the gonadotoxic effects of ciprofloxacin antibiotics and protective effects of L-carnitine. Methods: In this study, 20 NMRI mice were divided into four groups: control, ciprofloxacin, L-carnitine, L ...
Mina Kiani, Paria Parto
doaj
Physical and morphological characteristics of Kankrej bull semen
Veterinary World, 2013 Aim: Present investigation was carried out to study the physical characteristics of Kankrej bulls semen by evaluation of various semen parameters from neat semen and at various stages of semen preservation. Materials and Methods: A total of 60 ejaculates,
Bharatkumar R. Patel, G. M. Siddiquee
doaj +1 more source
Strictures of the female reproductive tract impose fierce competition to select for highly motile sperm [PDF]
arXiv, 2018 Investigating sperm locomotion in the presence of an external fluid flow and geometries simulating the female reproductive tract can lead to a better understanding of sperm motion during the fertilization process. In this study, using a microfluidic device featuring a stricture that simulates the biophysical properties of narrow junctions inside the ...
arxiv
Thermodynamic limits of sperm swimming precision [PDF]
arXiv, 2022 Sperm swimming is crucial to fertilise the egg, in nature and in assisted reproductive technologies. Modelling the sperm dynamics involves elasticity, hydrodynamics, internal active forces, and out-of-equilibrium noise. Here we demonstrate experimentally the relevance of energy dissipation for sperm beating fluctuations.
arxiv
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
Self-organized vortex phases and hydrodynamic interactions in Bos taurus sperm cells [PDF]
arXiv, 2023 Flocking behavior is observed in biological systems from the cellular to super-organismal length scales, and the mechanisms and purposes of this behavior are objects of intense interest. In this paper, we study the collective dynamics of bovine sperm cells in a viscoelastic fluid.
arxiv
Reproductive Biology and Endocrinology, 2023 Background Previous studies have demonstrated an association between male sperm quality and assisted reproduction outcomes, focusing on the effects of individual parameters and reaching controversial conclusions.
Tianwen Peng +7 more
doaj +1 more source
Signaling Enzymes Required for Sperm Maturation and Fertilization in Mammals
Frontiers in Cell and Developmental Biology, 2019 In mammals, motility and fertilizing ability of spermatozoa develop during their passage through the epididymis. After ejaculation, sperm undergo capacitation and hyperactivation in the female reproductive tract – a motility transition that is required ...
Souvik Dey +2 more
doaj +1 more source