to describe the morphological and histological changes during the annual reproductive cycle of the gonads of cyprinion tenuiradius, a total of 341 specimens (102 female and 235 male specimens) were collected monthly from the rudbal river (in the qarah aghaj sub-basin, the persian gulf basin), firuzabad, fars province, southern iran. the randomly sampling was adequate to collect males and female...

Hyper- or hypothyroidism can impair testicular function leading to infertility. The present study was designed to examine the protective effect of date palm pollen (DPP) extract on thyroid disorder-induced testicular dysfunction. Rats were divided into six groups. Group I was normal control. Group II received oral DPP extract (150 mg kg(-1)), group III (hyperthyroid group) received intraperiton...

PURPOSE To investigate the long-term effect of testicular torsion on sperm parameters and testis structure in order to introduce a novel mice azoospermic model for spermatogonial stem cell transplantation. MATERIALS AND METHODS Unilateral testicular torsion was created. The animals were divided into two groups each containing 15 mice. They underwent 2 and 4 hours of unilateral testicular isch...

Di(2-ethylhexyl) phthalate (DEHP) produced seminiferous tubular atrophy and reductions in seminal vesicle and prostate weight in 4-week-old, but not in 15-week-old rats. Di-n-pentyl phthalate (DPP) did produce atrophy in the older rats but this developed more slowly than in young animals. Coadministration of testosterone or gonadotrophins did not protect against phthalate-induced testicular tox...

AIM To evaluate the effects of melatonin on antioxidant enzyme levels and histopathologic changes in dizocilpine (MK-801)-induced psychosis model rat testis. METHODS A total of 24 adult male Wistar-Albino rats were divided into three groups with 8 in each. Group I was used as control. Rats in Group II were injected with MK-801 (0.5 mg/kg body weight i.p. for 5 days). In addition to MK-801, me...

Twelve Creole bulls 13.3 months of age were divided into three groups according to live weight. The first group received a low nutritional level and was housed in a shaded stable; the second group received a high nutritional level and was housed in the same stable as the first group; the third group received the same ration as the second group but was exposed to solar radiation. Live weight and...

In an attempt to determine the risk factors responsible for the dramatic increases in testicular cancer incidence in young adults, mothers of testicular cancer cases and controls were questioned about in utero exposures, pregnancy-related conditions, and perinatal factors during their pregnancies with the 202 cases and the 206 controls. The strongest risk factor was low birth weight with a grea...

Sperm acrosomes contain hyaluronidase, the amount varying, respectively, from ram, rabbit, bull, human, boar, rat, and stallion sperm to rooster sperm that do not possess this enzyme. Hyaluronidase was partially purified from bull sperm acrosomal extracts by DEAE-cellulose chromatography. Bull sperm acrosomal hyaluronidase has an optimum pH of 3.75 and is not effected by freezing and thawing or...