Table 2

Advantages and disadvantages of the original migration-sedimentation method according to Tea et al. (1984).

Advantage
Disadvantages

- usually very clean fraction of highly motile spermatozoa
- the original method is restricted to ejaculates of high sperm count and good motility
- reactive oxygen species are reduced
- the original method has a very low recovery rate
- very gentle separation method


- special glass or plastic tubes are required

- tubes are more expensive and relatively sensitive

- for repeated use in IVF, glass and plastic tubes must be sterilized

Henkel and Schill Reproductive Biology and Endocrinology 2003 1:108   doi:10.1186/1477-7827-1-108