Immotile sperm

Cattle populations are highly amenable to the genetic mapping of male reproductive traits because longitudinal data on ejaculate quality and dense microarray-derived genotypes are available for thousands of artificial insemination bulls. Two young Nordic Red bulls delivered sperm with low progressive motility (i.e., asthenospermia) during a semen collection period of more than four months.

13p visilicon2711 20-08-2021 6 1   Download

The present study was conducted to evaluate the effect of supplementation of glutathione and α-tocopherol in TRIS and skim milk based extenders on motility parameters of ram semen at refrigeration temperature. The research findings of the present study shown that, addition of glutathione improved motile sperm and reduced immotile sperm percentage than α-tocopherol in skim milk than TRIS egg yolk based extenders. Addition of glutathione improved rapid progressive sperm percentage than α-tocopherol in TRIS egg yolk than skim milk based extenders.

9p quenchua4 06-04-2020 7 1   Download

Human spermatozoa at ejaculation are incapable of in vivo fertilization and must undergo maturational change during which they acquire the ability to fertilize oocytes. This process, known as capacitation, was described more than 50 year ago by both Austin (1) and Chang (2). Capacitation is prevented in ejaculated spermatozoa by at least one factor in seminal plasma (3). Additionally, prolonged exposure to seminal plasma can inhibit the ability of spermatozoa to undergo the acrosome reaction in vitro (4) and diminish their capacity to fertilize (5).

14p lananhanh123 27-08-2011 56 5   Download