In degenerative changes in the testicles the semen picture tends to change over time with increased severity in progressive degeneration or improvement when regeneration is taking place. Are you sure you want to remove this search from Saved Searches? Chapter 8 discusses the evaluation of spermiograms. Acquisition of volume regulatory response of sperm upon maturation in the epididymis and the role of the cytoplasmic droplet. All statistical analyses were done using computer software SAS, version 9. Unknown, possible stress induced. Frozen-thawed semen samples from three ejaculates from a Nellore bull showed high levels of morphological sperm abnormalities
Abnormal sperm morphology
Although mean SC increased with the age of the bulls, the mean percentage of sperm abnormalities did not differ significantly. This work characterizes coiled sperm in infertile men to understand the clinical implications and investigate the possible cause by osmotic swelling. This resembles the phenomenon of sperm swelling in the HOS test where osmotic influx of water increases cell volume and reshapes the cell towards a spherical form to limit over-stretching of the plasma membrane, forcing the axonemal structure to coil or bend within the cell boundary. Support Center Support Center. The bull is restrained in a chute, the rectum is emptied, and the entire lubricated probe is inserted rectally with the electrodes oriented ventrally.
Semen Evaluation Flashcards | Quizlet
Mass activity or wave motion is determined by placing a drop of semen on a prewarmed microscope slide and examining the edge of the drop x40 or x power. Globozoospermia, where the sperm head appears small and round due to the failure of the acrosome to develop, is an example of a head defect. There are reports on the association of coiled sperm with infection with or without quantification Toth et al. Although mean SC increased with the age of the bulls, the mean percentage of sperm abnormalities did not differ significantly. A total of 19 ejaculates, 9 and 10, respectively from 2 bulls were used for CASA analysis. Pyriform head slight F.
Older bulls usually require a higher voltage for ejaculation. Pipet a drop of stain onto the end of a slide, then pipet a small droplet of semen next to the stain. Effect of the knobbed acrosome defect in bovine sperm on IVF and embryo production. However some semen samples are too dilute because of the method of collection or response of the bull to show wave motion. Barkema , Randy Wilde , John P. Many different staining techniques have been devised for examining sperm morphology.