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Human sperm ion channel (dys)function:implications for fertilization [PDF]
, 2019 BACKGROUND: Intensive research on sperm ion channels has identified members of several ion channel families in both mouse and human sperm. Gene knock-out studies have unequivocally demonstrated the importance of the calcium and potassium conductances in ...
Barratt, Christopher L. R. +3 more
core +3 more sources
Semen parameters are seriously affected in acephalic spermatozoa syndrome
Basic and Clinical Andrology, 2022 Résumé Contexte Des études antérieures ont rapporté que certains patients qui avaient des spermatozoïdes sans tête présentaient une mauvaise qualité du sperme, mais il n’y a eu aucune analyse systématique publiée sur la qualité du sperme chez les ...
Li-juan Ying +7 more
doaj +1 more source
Sperm Viability Matters in Insect Sperm Competition [PDF]
Current Biology, 2005 Experimental studies in insects have shown how sperm competition can be a potent selective force acting on an array of male reproductive traits . However, the role of sperm quality in determining paternity in insects has been neglected, despite the fact that sperm quality has been shown to influence the outcome of sperm competition in vertebrates .
Francisco Garcia-Gonzalez +1 more
openaire +3 more sources
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.
ALLAN A. PACEY +10 more
core +1 more source
Gamete evolution and sperm numbers: sperm competition versus sperm limitation [PDF]
Proceedings of the Royal Society B: Biological Sciences, 2014 Both gamete competition and gamete limitation can generate anisogamy from ancestral isogamy, and both sperm competition (SC) and sperm limitation (SL) can increase sperm numbers. Here, we compare the marginal benefits due to these two components at any given population level of sperm production using the risk and intensity models in sperm economics. We
Jussi Lehtonen, Geoff A. Parker
openaire +3 more sources
Frontiers in Endocrinology, 2023 BackgroundKlinefelter’s syndrome (KS) was once considered infertile due to congenital chromosomal abnormalities, but the presence of focal spermatozoa changed this.
Huang Liu +12 more
doaj +1 more source
Automated Sperm Assessment Framework and Neural Network Specialized for Sperm Video Recognition [PDF]
arXiv, 2023 Infertility is a global health problem, and an increasing number of couples are seeking medical assistance to achieve reproduction, at least half of which are caused by men. The success rate of assisted reproductive technologies depends on sperm assessment, in which experts determine whether sperm can be used for reproduction based on morphology and ...
arxiv
The Anatomical Record, Volume 306, Issue 1, Page 5-28, January 2023., 2023 Abstract Antlers are the most conspicuous trait of cervids and have been used in the past to establish a classification of their fossil and living representatives. Since the availability of molecular data, morphological characters have generally become less important for phylogenetic reconstructions.
Nicola S. Heckeberg +2 more
wiley +1 more source
Clinical and Experimental Obstetrics & Gynecology, 2021 Purpose of Investigation: Ovarian aging remains a difficult problem in infertility treatment. The traditional oriental herbs have been widely used for female infertility treatment.
Jong-Kil Joo +7 more
doaj +1 more source
The immunolocalization of HIF‐2α, GLUT1 and CAIX in porcine oviduct during the estrous cycle
The Anatomical Record, Volume 306, Issue 1, Page 176-186, January 2023., 2023 Abstract Oxygen (O2) rates in the oviduct are essential to human and animal reproduction. These rates are regulated by the activity of hypoxia markers such as the hypoxia‐inducible factors (HIFs), the glucose transporters (GLUT), and the carbonic anhydrase (CA).
Ester Párraga‐Ros +4 more
wiley +1 more source