نتایج جستجو برای: conventional semen parameters

تعداد نتایج: 827341  

2014
Evangelini Evgeni Konstantinos Charalabopoulos Byron Asimakopoulos

BACKGROUND The initial step in the diagnostic investigation of male infertility has been traditionally based on the conventional seminal profile. However, there are significant limitations regarding its ability to determine the underlying mechanisms that cause the disorder. Sperm DNA fragmentation has emerged as a potential causative factor of reproductive failure and its assessment has been su...

2015
Hai-xu Wang He-cheng Li Mo-qi Lv Dang-xia Zhou Li-zhi Bai Liang-zhi Du Xia Xue Pu Lin Shu-dong Qiu

Formaldehyde (FA), a ubiquitous environmental pollutant, has long been suspected of having male reproductive toxicity. However, FA male reproductive toxicity was inconclusive due to dearth of human studies. Therefore, we sought to investigate whether occupational exposure to FA affects semen quality. Semen quality including five conventional parameters and seven kinematics parameters were compa...

2012
Kamran Dorostkar Sayed Mortaza Alavi-Shoushtari Aram Mokarizadeh

The aim of the present study was to investigate the effect of in vitro supplementation of selenium on fresh and frozen spermatozoa quality of buffalo (Bubalus bubalis) bulls. Five healthy buffalo bulls (5 ejaculates from each bull) were used. Each ejaculate was diluted at 37 ˚C with tris-based extender containing 0 (control), 0.5, 1, 2, 4 and 8 µg mL(-1) sodium selenite and the sperm motility a...

Gabriela Ruth Mendeluk, Mónica Rosales

Objective The aim of this study was to evaluate the non-genomic action of thyroxin on sperm kinetic and its probable use to improve sperm recovery after applying an enrichment method like “swim-up” in comparison with the available one, pentoxifylline. MaterialsAndMethods This is an experimental study. A total of 50 patients were recruited, followed by infertility consultation. Conventional sper...

2017
Ioannis Vakalopoulos Spyridon Kampantais Stefania Lymperi Nikolaos Grivas Anastasios Ioannidis Ioannis Mykoniatis Vassilios Nikolaou Georgios Dimitriadis

Current guidelines suggest that treatment of varicocele should be considered in patients with clinically palpable disease and abnormal semen parameters. However, the clinicians are often challenged with the decision whether to treat varicocele in patients with testicular pain or low testosterone levels. Moreover, varicocele is highly associated with DNA fragmentation due to the oxidative stress...

Journal: :iranian journal of applied animal science 2015
m.m. mia m.a.m.y. khandoker s.s. husain m.o. faruque d.r. notter

black bengal goat is the heritage and one of the potential genetic resources of bangladesh. genetic and phenotypic parameters for semen characteristics and their relationships with scrotal circumference in black bengal bucks were estimated in this experiment. genetic parameters were estimated by residual maximum likelihood procedure, fitting an animal model ignoring maternal genetic or permanen...

2015
Kelly A Chiles Peter N Schlegel

Although abnormal semen parameters are generally considered to be poor predictors of fertility, Semen Analysis (SA) parameters are often used as a screening test to detect male factor infertility. Certainly, men with azoospermia or severe oligozoospermia have markedly impaired fertility potential [1-3]. Since men with abnormal fertility could undergo various medical or surgical treatments to im...

Journal: :Urology journal 2014
Mohammad Ali Khalili Maryam Adib Iman Halvaei Ali Nabi

PURPOSE Our aim was to evaluate the effect of neat semen vitrification on human sperm vital parameters and DNA integrity in men with normal and abnormal sperm parameters. MATERIALS AND METHODS Semen samples were 17 normozoospermic samples and 17 specimens with abnormal sperm parameters. Semen analysis was performed according to World Health Organization (WHO) criteria. Then, the smear was pro...

Journal: :Human reproduction 2004
Carole Marchetti Miguel-Angel Gallego André Defossez Pierre Formstecher Philippe Marchetti

BACKGROUND Detection of apoptosis in sperm samples may help evaluate sperm quality. Recently, it has been suggested that in some ejaculated sperm populations, apoptosis is caspase dependent. The aim of this study was to investigate the presence of activated caspases and examine possible correlations with apoptosis and sperm parameters in semen samples prepared for IVF. METHODS To detect activ...

Journal: :Human reproduction 2005
Monica Muratori Sara Marchiani Gianni Forti Elisabetta Baldi

BACKGROUND Global ubiquitination in human semen has been found to negatively correlate with standard semen parameters, indicating that ubiquitination can be considered a marker of poor semen quality. However, the inclusion of all semen components in the analysis may be misleading on the biological significance of ubiquitination of sperm cells. We have recently demonstrated the variable presence...

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