نتایج جستجو برای: fertile men
تعداد نتایج: 195471 فیلتر نتایج به سال:
OBJECTIVES To provide information of semen quality among normal young Japanese men and indicate the frequency of reduced semen quality. DESIGN Cross-sectional, coordinated studies of Japanese young men included from university areas. The men had to be 18-24 years, and both the man and his mother had to be born in Japan. Background information was obtained from questionnaires. Standardised and...
Background: Varicocele suggests that in addition to effects on spermatogenesis, varicocele also impairs testicular Leydig cell function with a consequential decrease in testosterone production; correction of the varicocele may result in improved serum testosterone levels. Materials and Methods: We measured preoperative serum testosterone levels in 40 infertile men with varicoceles varicocele (g...
Background: Varicocele is recognized as the most common cause of male factor infertility and is found in 15% of the general population. This prevalence increases to 35% in men presenting with primary infertility and between 70 to 80% in men presenting with secondary infertility. The effect of varicocele on Leydig cell function and testosterone production has been always a question. In this stud...
Defects in early meiotic events are thought to play a critical role in male infertility; however, little is known regarding the relationship between early meiotic events and the chromosomal constitution of human sperm. Thus, we analyzed testicular tissue from 26 men (9 fertile and 17 infertile men), using immunofluorescent techniques to examine meiotic chromosomes, and fluorescent in situ hybri...
Background: The aim of this study was to determine the sperm deformity index (SDI) of proven fertile males and compare this with that of infertile males. Methods: The study was carried out at Islamic International Medical College Rawalpindi and Islamabad Clinic Serving Infertile Couples, Islamabad, from July 2005 to July 2006. It was a cross-sectional comparative study. Fifty healthy fertile ma...
Objective Background: Human papillomavirus (HPV) is a DNA virus that causes sexually transmitted infection (STI). Recent reports have suggested that HPV may affect sperm parameters and lead to male infertility. This study is aimed to evaluate the correlation between seminal high-risk HPV infection and impairment of sperm quality in Iranian infertile men. MaterialsAndMethods Materials and Method...
Factors affecting the blood-testis barrier function may be involved in testicular damage and male infertility. Two cytokines play an important role in the barrier regulation, namely transforming growth factor beta 3 (TGF-β3) and tumor necrosis factor (TNF-α). The aim of this study was to investigate the potential association between TGF-β3 (TGFB3) and TNF-α (TNF) gene polymorphisms and male inf...
To investigate the relation of luteinizing hormone (LH), follicle-stimulating hormone (FSH) and Testosterone serum levels with partial deletions in the AZFc region in Iranian oligozoospermia males. Material and methods: thirty infertile oligozoospermia and 52 Iranian fertile men included. The hormonal assays were measured by the Radioimmunoassay (RIA). Multiplex polymerase chain reaction (M-PCR...
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