A new technique for surgical treatment of idiopathic varicocele is described. This technique consists of internal spermatic vein ligature and its resection and microvascular anastomosis between proximal tract of the internal spermatic and saphenous vein. In this way a communication is established between a high regimen pressure with a lower one. Fourteen idiopathic varicoceles are successfully operated with this new technique.
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PLoS One
January 2025
Department of Aqualife Medicine, Chonnam National University, Yeosu, Republic of Korea.
The present study describes the differentiation process of male germ cells in Octopus vulgaris, the morphology of sperm in the testis and spermatophore, and the sperm released after the spermatophoric reaction. During spermatogenesis, the male sperm cell gradually elongates from a round shape, with cytoplasm shifting toward the head and the acrosome forming. Additionally, in the spermatid stage, the flagellum develops within the posterior nuclear channel and extends outside the cytoplasm.
View Article and Find Full Text PDFVet Res Forum
December 2024
Department of Theriogenology, Faculty of Veterinary Medicine, Urmia University, Urmia, Iran.
The cooling procedure markedly diminishes the quality of guinea pig () sperms, primarily because their membranes are highly susceptible to this process. This susceptibility triggers the generation of reactive oxygen species and free radicals, ultimately leading to lipid peroxidation in the sperm membrane. Surprisingly, there has been a lack of research on the use of Tris-based extenders to safeguard guinea pig sperm under refrigeration conditions.
View Article and Find Full Text PDFInt J Mol Sci
December 2024
Faculty of Medicine, Slovak Medical University, Limbová 12, 833 03 Bratislava, Slovakia.
Fertility disorders are a worldwide problem affecting 8-12% of the population, with the male factor substantially contributing to about 40-50% of all infertility cases. Mitochondria, crucial organelles for cellular viability, play a pivotal role in the processes of spermatogenesis and significantly affect sperm quality and their fertilizing ability. Mitochondrial oxidative phosphorylation (OXPHOS) dysfunction, reduced energy supply for sperm, reduced endogenous coenzyme Q (CoQ) levels, and oxidative stress are among the main factors that contribute to male infertility.
View Article and Find Full Text PDFAntioxidants (Basel)
November 2024
Laboratory of Animal Physiology, School of Veterinary Medicine, Faculty of Health Sciences, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece.
Reactive Oxygen Species (ROS) play an important role in sperm physiology. They are required in processes such as capacitation and fertilization. However, the exposure of spermatozoa to ROS generated from internal or external sources may create a potentially detrimental redox imbalance.
View Article and Find Full Text PDFHum Reprod
December 2024
Division of Translational Endocrinology, Department of Endocrinology and Internal Medicine, Copenhagen University Hospital, Herlev, Gentofte, Denmark.
Study Question: Is serum phosphate linked with semen quality and reproductive hormones in infertile men?
Summary Answer: Hypophosphatemia is a frequent finding in infertile men and is associated with lower number of motile sperm.
What Is Known Already: Phosphate is available in fluid from all segments of the male reproductive tract in concentrations manyfold higher than in serum. However, the role of phosphate in male fertility is largely unknown.
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