this study was designed to clarify bilaterally effect of long-time varicocele on left and right testes and to identify the effect of varicocele on maturation divisions during spermatogenesis. moreover, the percentage of seminiferous tubules (sts) with i-viii and ix-xiv stages of spermatogenesis and sperm parameters such as sperm motility and abnormality types were evaluated. the left varicocele...

BACKGROUND Signaling molecules such as cytokines regulate spermatogenesis during the maturation of germ cells and sperm apoptosis. Tumor necrosis factor alpha (TNFα) is one of the most-documented cytokines that is involved in spermatogenesis. We investigated the association of the TNFα -308 G/A single nucleotide polymorphism with sperm abnormalities in Iranian males. MATERIALS AND METHODS Thi...

This study was designed to clarify bilaterally effect of long-time varicocele on left and right testes and to identify the effect of varicocele on maturation divisions during spermatogenesis. Moreover, the percentage of seminiferous tubules (STs) with I-VIII and IX-XIV stages of spermatogenesis and sperm parameters such as sperm motility and abnormality types were evaluated. The left varicocele...

The exposure of male mice to radiofrequency radiations from mobile phone (GSM) base stations at a workplace complex and residential quarters caused 39.78 and 46.03%, respectively, in sperm head abnormalities compared to 2.13% in control group. Statistical analysis of sperm head abnormality score showed that there was a significant (p < 0.05) difference in occurrence of sperm head abnormalities ...

the aim of this study was to evaluate the effect of d-aspartic acid on semen characteristics of ross 308 roosters. thirty 60-wk-old ross 308 roosters were randomly assigned into 6 groups and individually caged. all groups fed the same basal diet and orally administered with different levels of d-aspartic acid: 0(a-0), 40 (a-40), 80 (a-80), 120 (a-120), 160 (a-160), and 200 (a-200) mg/kg bw per ...

The primary cause of sperm quality decline during the freeze-thaw pathway is peroxidation hazard caused by reactive oxygen species produced biological molecules sperm. Ascorbic acid (Vitamin C) and lycopene are two potent antioxidants that operate to prevent oxidation processes. This study aimed analyse effects ascorbic on motility, viability, abnormality plasma membrane integrity post-thawed S...

four mature stallions were used to study the effect of enzymatic antioxidant catalase on freezability of turkmen stallion&apos;s sperm. collected semen from stallions were processed and pooled before being divided treatments (200×106  sperm/ml) and diluted with extenders supplemented with different levels of catalase [0 (control), 100 u/ml (cat100), 150u/ml (cat150) and 200u/ml (cat200)]. exten...

Silkworm (Lepidoptera) males produce dimorphic sperm: nucleate eupyrene sperm and anucleate apyrene sperm. The eupyrene sperm are ordinary sperm to fertilise the eggs, while the function of apyrene sperm remains uncertain. After meiosis, 256 sperm cells are enclosed by a layer of cyst cells, forming a sperm bundle. We have previously documented that the nucleus of eupyrene sperm anchors to the ...

This research aims to find out the effect of vitamin C supplementation and Zn mineral (Zinc) in citrate egg yolk dilution (C-EY) on motility, viability, abnormality endurance bali bulls spermatozoa during storage. The material used is fresh sperm good quality bulls. Sement diluted with treatment diluent is: T0: C-EY – 100%, T1: 0.05 g Zn, T2: Vitamin C, T3: 0.025 After semen stored at a tempera...

The objective of this study was to develop a protocol for ram epididymal sperm preservation that could be applied to wild ruminants for collection and preservation of spermatozoa from dead or hunted animals. Ram testicles collected from abattoirs were used to study the effect of two transportation temperatures viz. ambient temperature (AT) and refrigeration temperature (RT) on the cauda epididy...