BACKGROUND Standardization of the semen analysis may improve reproducibility. We assessed variability between laboratories in semen analyses and evaluated whether a transformation using Z scores and regression statistics was able to reduce this variability. MATERIALS AND METHODS We performed a retrospective cohort study. We calculated between-laboratory coefficients of variation (CVB) for spe...

INTRODUCTION Studies that compare the impact of different infectious entities of the male reproductive tract (MRT) on the male accessory gland function are controversial. MATERIALS AND METHODS Semen analyses of 71 patients with proven infections of the MRT were compared with the results of 40 healthy non-infected volunteers. Patients were divided into 3 groups according to their diagnosis: ch...

OBJECTIVE To explore potential relationships between sperm DNA integrity and both semen parameters and clinical outcomes. METHODS Semen analysis of 498 samples was performed according to the 2010 criteria of the World Health Organization. The sperm DNA fragmentation Index (DFI) of the semen samples was assessed using a neutral comet assay. RESULTS Sperm DFI showed a significant correlation ...

BACKGROUND Varicocele, one of the most common causes of sperm abnormalities in men, is the dilation of the testicular vein (the pampiniform venous plexus) by more than 2 mm. Ultrasonography is the primary imaging procedure for varicocele diagnosis. The venous diameter is evaluated using B-mode sonography, and venous reflux is assessed using color Doppler sonography. OBJECTIVES In this study, ...

background: we investigated the effects of carbamazepine (cbz) on semen parameters in men with newly diagnosed epilepsy, by performing semen analysis before starting any antiepileptic drugs, and then after starting cbz, to determine the role and effects of cbz in creating abnormalities in sperm analysis in these patients. methods: in this prospective study, eight male patients 20-40 years of ag...

background: sperm selection is generally used to describe methods for separation of spermatozoa for in-vitro-assisted reproduction. few studies reported relation in vivo fertility and semen parameters after selection of fertile spermatozoa; hence, our research attempt to assess different semen parameters after post-thaw (pt) or after selecting sperm sample (ssp), using density gradient separati...

PURPOSE To determine whether patients with male factor infertility can be accurately identified by calculating a novel semen quality score and measuring levels of reactive oxygen species during routine infertility screening. METHODS Semen samples from 133 patients and 91 healthy donors were evaluated with manual and computer-assisted semen analysis. A principal component analysis model was em...

background: leptin is a polypeptide hormone secreted by white adipose tissue in proportion to body energy. although the participation of leptin in female reproduction is well established any role in male reproductive function is at best tenuous. objective: the objective of this study was to compare the leptin concentration in human seminal plasma and then the relationships between seminal lepti...