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The hypoosmotic swelling test: Its employment as an assay to evaluate the functional integrity of the frozen-thawed bovine sperm membrane.
The results obtained in this study indicate that frozen-thawed bovine spermatozoa did react to the HOS test, and this technique could prove useful in studies involving the function of the sperm membrane and could possibly predict the sperm's ability to fertilize. Expand
Relationships among frozen-thawed sperm characteristics assessed via the routine semen analysis, sperm functional tests and fertility of bulls in an artificial insemination program.
Analysis of specific sperm swelling patterns showed that those patterns considered to reflect maximal sperm swelling were indicative of high fertility, and correlation coefficients among the various sperm characteristics and fertility of bulls were highly significant. Expand
Effects of smoking on testicular function, semen quality and sperm fertilizing capacity.
- N. Sofikitis, I. Miyagawa, D. Dimitriadis, P. Zavos, S. Sikka, W. Hellstrom
- The Journal of urology
- 1 September 1995
Morphological sperm abnormalities due to secretory dysfunction of the Leydig and Sertoli cells may be the cause of impaired sperm fertilizing capacity in smokers. Expand
Sperm membrane functional integrity and response of frozen-thawed bovine spermatozoa during the hypoosmotic swelling test incubation at varying temperatures.
Thawing of spermatozoa at 37 degrees C, followed by processing at 21 degrees C seems to reduce the negative effects associated with osmotic shock and results in the preservation of the sperm membrane functional status during the in vitro handling of frozen-thawed bovine spermarozoa. Expand
Effects of seminal plasma from cigarette smokers on sperm viability and longevity.
- P. Zavos, J. Correa, S. Antypas, P. Zarmakoupis-Zavos, C. N. Zarmakoupis
- Fertility and sterility
- 1 March 1998
The results generated in this study could be of clinical significance since removal of smokers' SP and subsequent reconstitution and incubation in physiological media seems to enhance the viability, longevity, and possibly the fertilizing ability of these spermatozoa for use in various assisted reproductive technologies. Expand
Preparation and recovery of frozen-thawed bovine spermatozoa via various sperm selection techniques employed in assisted reproductive technologies.
Enhancement of sperm motility, in conjunction with the most appropriate sperm selection technique, represents an efficient method for the recovery of spermatozoa with improved qualitative characteristics. Expand
Seminal parameters of ejaculates collected from oligospermic and normospermic patients via masturbation and at intercourse with the use of a Silastic seminal fluid collection device.
- P. Zavos
- Fertility and sterility
- 1 October 1985
The SCD can be of greater assistance to male infertility patients with oligospermia and other spermatogenic dysfunctions and produce a specimen that closely resembles the ejaculate obtained during intercourse, as shown in this study. Expand
Effects of feeding endophyte-infected (Acremonium coenophialum ) KY-31 fescue hay on the reproductive development of Holstein bulls.
Overall, the results indicate that endophyte infected KY-31 fescue hay fed to growing bulls did not appear to have severe detrimental effects on body growth or reproductive development. Expand
Bilateral effect of unilateral vasectomy on testicular testosterone biosynthesis.
- S. Antypas, N. Sofikitis, F. Rodríguez, P. Zavos, I. Miyagawa
- Journal of pediatric surgery
- 1 June 1994
Findings indicate a bilateral deficiency in both Leydig and Sertoli cell secretory function in unilaterally vasectomized dogs, resulting in impaired bilateral spermatogenesis and sperm maturation and suggest that unilateral injuries of the vas deferens during hernia operations in children may result in bilateral testicular dysfunction. Expand