OBJECTIVE To explore the therapeutic effect of natural vitamin E (VitE) on oligospermia and asthenospermia in in- fertile men. METHODS We conducted a prospective multi-centered randomized controlled study on 64 infertile men with oligospermia (31 as controls treated with Tamoxifen 10 mg bid and 33 as experimental cases treated with Tamoxifen 10 mg bid + VitE 100 mg tid) and 42 cases of asthen...

background: high level of semen reactive oxygen species is considered as an important factor in male infertility. sesame has antioxidant properties, which could be effective on improvement of semen parameters. this study was designed to determine the effects of sesame on sperm quality.   materials and methods: twenty‑five infertile men entered this clinical trial. they were treated with a 3â€...

OBJECTIVE To evaluate the relationship between duration of sexual abstinence and various characteristics of normal and subnormal semen. DESIGN A retrospective study based on computerized data. SETTING Fertility and IVF unit at a university medical center. PATIENT(S) Nine thousand, four hundred eighty-nine semen samples from 6,008 patients were analyzed according to the World Health Organi...

OBJECTIVE To investigate the relationship between testicular volume and semen parameter sin patients with unilateral high grade left varicocele. MATERIAL AND METHODS One hundred eighty seven patients who had left high grade varicocele aged 19-to-25 years were included in this study. All patients underwent a standard evaluation, including medical history and physical examination. The percentag...

In this study, age-dependent changes of sperm quality parameters in Rutilus frisii were investigated. Also, fertilization capacity of breeders was tested using two age groups of males (3 and 4 year old breeders) and one female group (i.e. 4 year old breeders). For fertilization trials, the breeders were crossed randomly among age classes. Between the two age groups, spermatological parameters d...

background: as we all know, sperm has the capacity to take up foreign dna, therefore, sperm mediated gen transfer can be an inexpensive and simple method in animal transgenesis in various species. however, there is not sufficient evidence of dna uptake by ovine spermatozoa. objectives: the purpose of the present study was to examine the uptake of human lysozyme gene contained plasmid (pegfp-ire...

background: sperm vitrification is a technique of ice and cryoprotectant free cryopreservation by direct plunging of sperm suspension into liquid nitrogen (ln2). the aim of this study was to investigate the influence of cryoprotectant free-vitrification on human sperm fine structure by msome technology and the fertility potential by zona binding assay (zba). methods: 20 normo-ejaculates were pr...

this research was carried out to investigate the effects of various levels of dietary organic selenium supplementation (0, 0.1,  0.2 and  0.3 mg/kg) on reproductive traits of rooster. semen was collected using abdominal massage and samples were mixed together. sperm characteristics including percentage of motile, viable and abnormal sperms were assessed. this experiment was carried out based on...

objective: adiponectin and its receptors (adipor1 and adipor2), known as adiponectin system, have some proven roles in the fat and glucose metabolisms. several studies have shown that adiponectin can be considered as a candidate in linking metabolism to testicular function. in this regard, we evaluated the correlation between sperm mrna abundance of adiponectin and its receptors, with sperm mot...

Background: The motility patterns of spermatozoa correlate with the rate of natural pregnancy. It is not clear which compounds in spermatozoa or seminal plasma may be involved in the regulation of sperm motility. Considering the decrease of omega-3 fatty acids in spermatozoa of asthenozoospermic men, the aim of the present study was to investigate the effects of combined docosahexaenoic acid (D...