Property

Washing; simple filters

Migration e.g. swim-up

Filtration

Colloid centrifugation

Ease of use

Simple

Requires some attention to detail

Equipment required

Centrifuge

Special tubes needed for swim-through

Centrifuge

Consumables

Centrifuge tubes

Special tubes needed for migration/sedimentation

Glass wool, Sephadex, filters

Colloids

Cost per sample

Lowest

Low, unless media contains hyaluronate

Higher

Highest

Sperm selection

None

Based only on motility

Based on motility, morphology, intact acrosomes

Based on motility, morphology, viability, chromatin integrity, acrosome integrity.

Seminal plasma removed

Mostly

Yes

Some removed

Yes

Pathogens and debris removed

No

?

?

Yes

Yield of motile spermatozoa

?

10% - 20%

ca. 60% - 85%

>50%

Leukocytes

Present

Removed

Removed

Removed

Acrosome

Unknown effect

May be damaged

Increased % intact

Increased % intact

Other

Hyaluronate-containing media may induce acrosome reaction

Contamination by e.g. glass fibres

Possible problems with PercollTM (endotoxin levels, PVP etc)

Animal

Buffalo, ram, boar, stallion

Bull, ram, boar, dog

Ram, boar, buffalo, bull

Bull, ram, boar, stallion, turkey, dog, leopard