Humans are ubiquitously exposed to multiple environmental contaminants. Consequences of combined action on the reproductive system remain unknown. This study aimed to assess single and joint effects of cadmium and diazinon exposure on sperm quality parameters. Male adult Wistar rats were randomized into 4 groups of ten animals each. Sperm morphology and motility were evaluated using a bright field microscope and a computer-assisted semen analysis.
Heat stress may affect male reproductive functions. This may further induce testicular tissue apoptosis and morphological changes affecting sperm production processes, resulting in infertility 4 — 6. In addition, increased scrotal temperatures resulting from occupational exposure, lifestyle or cryptorchidism are notable factors leading to male infertility 7. Limited research has been conducted on the epididymis 8. Spermatozoa are produced in the testis and acquire the maturation ability in the epididymis, particularly in the caput epididymis, by interacting with the epididymal fluids 9 ,
The aim of this study was to assess the sperm quality and testicular histomorphometry of Wistar rats supplemented with extract and fractions of fruits of Tribulus terrestris L. The ethanolic extract was obtained by dynamic maceration of spray-dried fruit. This extract was fractionated by liquid-liquid partition, using increasing polarity solvents. Twenty male rats were separated in four groups, with five rats in each group. The control was supplemented with distilled water, while the others were daily given the ethanolic extract, hexanic or aqueous fraction soluble in methanol in a dose of 42 mg.
We have studied sperm structure and motility in a eusocial rodent where reproduction is typically restricted to a single male and behaviourally dominant queen. Males rarely compete for access to the queen during her estrus cycle, suggesting little or no role for sperm competition. Our results revealed an atypical mammalian sperm structure with spermatozoa from breeding, subordinate and disperser males being degenerate and almost completely lacking a "mammalian phylogenetic stamp".