Sperm experience intense and varied selection that dramatically impacts the evolution of sperm quality. Selection acts to ensure that sperm are fertilization-competent and able to overcome the many challenges experienced on their way towards eggs. However, simply being able to fertilize an egg is not enough to ensure male fertility in most species. Owing to the prevalence of female multiple mat...

the environmental pollution is one of the factors contributing to the decrease of sperm quality for human beings. the aim of this study was to assess cadmium (cd), chromium (cr), and copper (cu) concentration of man in environmental pollution site, and explore relationships between men exposure to cd, cr, and cu and semen-quality parameters in environmental pollution site.ninety five men were r...

We describe the case of a couple whose infertility was caused by the absence of seminal emission following retroperitoneal surgery for testicular cancer. Ejaculate could be retrieved from the husband by rectal probe electroejaculation (RPE) but sperm quality was so poor that conventional in-vitro fertilization was impossible. With intracytoplasmic sperm injection of spermatozoa retrieved by RPE...

Introduction: Male infertility is an important factor of infertility in couples. In most cases it is caused by defects in sperm cell function; whether low sperm cell count or reduced motility along with altered morphology. Defects in sperm cells development are influencing enzyme activities in the seminal fluid. Aim: This research tried to determine can activity of creatine kinase (CK) in semin...

Seminal fluid often makes up a large part of an ejaculate, yet most empirical and theoretical studies on sperm competition have focused on how sperm characteristics (number and quality) affect fertilization success. However, seminal fluid influences own sperm performance and may potentially influence the outcome of sperm competition, by also affecting that of rivals. As a consequence males may ...

BACKGROUND AND OBJECTIVES This study aimed to investigate the effects of tomato juice consumption on seminal plasma lycopene levels and sperm parameters in infertile men. METHODS AND STUDY DESIGN Subjects were male infertility patients with poor sperm concentration (<20×10 6/mL) and/or motility (<50%). Following a fourweek observation period, subjects were randomly assigned among three groups...

Objective: To find out relationship of zinc concentrations in blood and seminal plasma with various semen parameters between fertile and infertile men. Design: Prospective study. Setting: This study was carried out in the Infertility Clinic of Jinnah Postgraduate Medical Center (JPMC), Karachi and Department of Biochemistry, Basic Medical Sciences Institute, JPMC, Karachi. Subjects & Methods: F...

tau.amegroups.com © Translational Andrology and Urology. All rights reserved. Recent studies show that spermatozoal DNA integrity is essential for normal fertilization and transmission of paternal genetic information to the offspring. Additionally, fertilization and embryo development depend on the sperm DNA structure (1,2). Generally, while fertile men have high levels of sperm with intact DNA...

BACKGROUND Alterations at the molecular level in spermatozoa and seminal plasma can affect male fertility. The objective of this study was to determine if analysis of differential expression of proteins in varying semen parameters can serve as potential biomarkers for male infertility. METHODS The differential expression of proteins in the seminal plasma of men based on sperm count and morpho...

Recent studies have suggested that males may vary the quality of their ejaculates in response to sperm competition, although the mechanisms by which they do so remain unclear. The viability of sperm is an important aspect of ejaculate quality that determines competitive fertilization success in the field cricket Teleogryllus oceanicus. Using in vitro mixtures of sperm and seminal fluid from pai...