The density centrifugation technique from Nidacon is based on a silane coated silica colloid in a nutrient salt solution. Density centrifugation of semen separates spermatozoa from the seminal plasma and thereby improves both the quality and the freezeability of animal sperm. The use of the technique makes sperm sexing much more efficient and time saving and the spermatozoa can be refrozen after the procedure. Studies also show an improved fertility if the sperm is prepared with the colloid prior to freezing.
