The mammalian acrosome reaction (AR) is the fusion, at multiple points, of the outer acrosomal membrane with the overlying plasma membrane. This fusion causes the release of acrosomal contents and the exposure of the inner acrosomal membrane. The time taken for this process to occur is not accurately known. Estimates for AR in mouse spermatozoa vary from ;2 minutes after stimulation with solubi...

Genetic selection in primary broiler breeders may modify skeletal structure, possibly impeding semen transfer, and could alter the size and degree of fluctuating asymmetry (FA) of bilateral traits associated with fertility. Hence, we hypothesized specific morphometric traits could predict differential fertility. Sixty primary broiler breeder males from Strains A and B (n = 30/strain) were indiv...

lynestrenol 0.5 mg.(exlution) given to patients orally from the first day of their cycle in a continuous manner suppressed cervical mucorrhea and spinbarkeit sufficiently ennough to stop sperm penetration to the cervical canal. fern reactions were mostly negative and all post- coital examinations (sims huhner tests) showed an absence of spermatozoa.

Eukaryotic flagella are responsible for the motile organelles that cause the migration of mammalian sperms. The lashing force and torque of the sperm flagellum contain critical information regarding the sperm health, as important evaluation factors for sperm screening. The objective of the study was to investigate the lashing force and torque of a sperm under physiological conditions using at...

As the chemical environment of semen can have a profound effect on sperm quality, we examined the effect of pH on the motility, viability and capacitation of human sperm. The sperm in this study was collected from healthy males to avoid interference from other factors. The spermatozoa cultured in sperm nutrition solution at pH 5.2, 6.2, 7.2 and 8.2 were analyzed for sperm total motility, progre...

We present a novel penetration depth estimation algorithm based on the use of deformed distance fields for simulation of non-penetrating flexible bodies. We assume that the continuum of non-rigid models are discretized using standard techniques, such as finite element methods. As the objects deform, the distance fields are deformed accordingly to estimate penetration depth, allowing enforcement...

A modified chemotaxis chamber was used to evaluate cellulose acetate/nitrate filters for the measurement of dog sperm motility. The distance travelled into the filters was affected by filter pore size, incubation time and sperm concentration. After storage of spermatozoa at 37 degrees C the distance penetrated into the filters reflected the deterioration of the sample, but was not as sensitive ...