Altrenogest is being administered to young stallions in racing and performance to decrease sexually aggressive behavior, although the effects on fertility are unknown. In young stallions, treatment with altrenogest significantly decreased sperm output, testicular size, and hormone production. Eight weeks was not sufficient for recovery. Authors’ address: Dept. of Animal Science and Food Technol...

A hydroponic experiment was carried out to compare root anatomy and hydraulic conductivity of four barley cultivars including Valfajr, Karoon, Afzal and Zarjo under salt stress conditions. The results showed that under salt stress, the minimum diameter of vessels was observed in the peripheral metaxylem of seminal roots of Valfajr cultivar and in adventitious roots; Karoon with 19±3 µm had maxi...

Background: Defective sperm function is now recognized as one of the most important causes of male infertility. Lipid peroxidation (LPO) is known to cause various impairments of sperm cells and may play a major role in the etiology of male infertility. Malondialdehyde (MDA) is one of the final products of lipid peroxidation in seminal plasma. Seminal plasma possesses a rich source of different ...

The present research was undertaken to determine the role of seminal plasma in heat stress (HS) infertility. Males were exposed to HS at 32 C or maintained at 21 C as controls. Centrifugation and reconstitution of semen samples created four final treatments: control sperm + control plasma (CsCp), control sperm + HS plasma (CsHp), HS sperm + HS plasma (HsHp), and HS sperm + control plasma (HsCp)...

To the Editor: The Technical Brief by Blase et al. [1] reported some troubling clinical conclusions while describing analytical differences among various immunoassays of prostate-specific antigen (PSA). Their study used samples consisting of free PSA and PSA complexes prepared in vitro. The free PSA molecule represents a very heterogeneous population, including pro-PSA, cleaved (“nicked”) PSA [...