Currently, spermogram parameters are routine criteria for assessing male fertility. There two methods of semen analysis: traditional manual and automated. The concentration spermatozoa various motility categories is important in predicting physiological conception, as well choosing fertilization assisted reproductive technology programs. introduction automatic analyzers has shown that their use...

The aim of this study was to investigate the effect of platelet activating factor (PAF) on the quality characteristics of cryopreserved canine spermatozoa. Cryopreserved semen of 5 mixed-breed dogs was treated with different concentrations of exogenous PAF (1 x 10(-3) M, 1 x 10(-4) M, 1 x 10(-5) M and 1 x 10(-6) M) and examined at different time intervals (0, 30, 60 and 120 min). Cryopreserved ...

We have undertaken an analysis of semen from HIV infected men with regard to sperm counts and motility, non-spermatozoal cells, and viral nucleic acid. Regression analysis showed that sperm concentration and motility were positively associated with blood CD4 cell count. By contrast, non-spermatozoal cell concentration (round cells) was inversely related to CD4 count. Extracellular HIV RNA was d...

To determine the effect of low protein intake on boar libido, semen characteristics, and plasma hormone concentrations, 20 crossbred boars (1 yr of age) were divided into 10 littermate pairs, and boars from within pairs were fed 44 g/kg of BW.75 per day of either a low-protein diet (7% CP) or a control diet (16% CP) with the same energy content (3.41 Mcal of ME/kg). During the first 16 wk and f...

Studies were conducted to assess (a) the pH and motility of semen removed from the ductus (d.) deferens and receptaculum from males sexually rested 1 wk, (b) the pH, motility, and sperm concentration of semen after each successive ejaculation (ejaculated 3 or 5 times at 30-60 min intervals) and (c) the rate of semen replenishment and the fertility of the replenished semen after emptying the d. ...

Evaluation of the quality of cryopreserved bull spermatozoa is reviewed. The methods for the assessment of sperm quality have markedly improved over the last decades – starting with the assessment of morphological shapes and subjective motility analysis towards the more sophisticated analysis of the molecular changes in chromatin, membranes and catabolic activities of the sperm cell itself. Fun...