sperm capacitation

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sperm capacitation

Changes in spermatozoa, occurring in the female reproductive tract, that make them potentially capable of fertilization of an ovum.


the male germ cell. See also spermatozoon.

sperm agglutinins
anti-sperm antibodies of the IgG class occur as autoantibodies in dogs infected with Brucella canis.
sperm capacitation
acquisition of the capacity to penetrate an ovum, not present at the time of delivery of the spermatozoon, and which requires a period of incubation in the female tract. It involves increased metabolic activity and motility and the removal of a chemical decapacitation factor from the spermatozoon. Capacitation must take place for the acrosome reaction to occur.
sperm concentration
a sperm count as measured in a hemocytometer; an indication of the health of the relevant testicles and a guide to the prospective fertility of the ejaculate and the donor.
sperm live-dead ratio
an indicator of the viability of the ejaculate as expressed in a slide count of a specially stained smear of the semen in which the dead and live sperm can be distinguished because of their differential staining.
sperm morphology
the normal anatomical structure of the spermatozoon. Abnormality of the structure of individual spermatozoa is used as a guide to the location and nature of the disease causing reduced reproductive efficiency.
Enlarge picture
Morphology of normal and abnormal canine spermatozoa. By permission from Nelson RW, Couto CG, Small Animal Internal Medicine, Mosby, 2003
sperm motility
the percentage of spermatozoa moving actively forward. Assessed under the microscope (400 × magnification) or by computerized imaging. See also wave motion; used to predict the probable fertility of the ejaculate.
sperm motility index
half the sum of the sample's sperm percentage motility + sperm progressive motility.
sperm penetration assay
see ovum penetration assay.
sperm stone
hard bodies composed of inspissated masses of spermatozoa found in dilated remnants of epididymal ducts and produced by chronic epididymitis.
sperm transport
within both male and female reproductive tracts some movement forward results from the movements of the spermatozoa but most progress is the result of peristaltic movements by the tubular organs in which the spermatozoa find themselves at the time.
References in periodicals archive ?
Intracellular calcium regulation in sperm capacitation and acrosomal reaction.
Promoting in-vivo sperm capacitation, ToConceive also helps treat some types of male subfertility, such as anti-sperm antibodies caused by an infection in the prostate, insufficient numbers of sperm and abnormal sperm that prevents fertilization.
Values for rates of sperm capacitation, embryo development, ICM and TE cell numbers, and the relative gene expression levels were evaluated using analysis of variance (ANOVA) with the general linear model (PROC-GLM) in the SAS software program p [less than or equal to] 0.
Among GAG exposure groups, the HA and HP treatments elicited the most dramatic effects on sperm capacitation, relative to the CS and DS treatments (DS < CS < HA < HP) at 3 h or longer incubation times (p < 0.
The interaction between sperm and the oviductal cells is known to be beneficial for in vitro sperm capacitation and survival in different species (16, 19-22).
Another possibility for the lower cleavage and embryo development in our study might be related to the sperm capacitation changes during sperm binding to OECs and its exposure to the CM.
1999) reported that superoxide anion and hydrogen peroxide, two ROS, are required for sperm capacitation and acrosome reaction, respectively.
Effect of sperm capacitation and fertilization media on IVF and early embryo development of prepubertal goat oocytes.
1989) suggested that glucose has an inhibitory effect on sperm capacitation and the fertilization of oocytes.
Our previous study on guinea pig sperm capacitation showed that calcium and bicarbonate but not BSA were required for supporting in vitro capacitation and hyperactivation (Kong et al.