We should be cautious when setting the number of sperm per insemination dose, so the urge to reduce it does not make us use a number that is under the fertility threshold. Something that may be productive and/or profitable for a certain farm may not be so for another farm.
Swine AI: which technique to use and how many sperm per dose?
The present and future of cryogenically preserved of swine semen
Despite its scarce use in commercial artificial insemination programs (used only in 1% of all inseminated sows) nowadays no one questions the sanitary, economic, and productive advantages of cryogenically preserved semen with respect to fresh or refrigerated semen.
New fresh-semen artificial insemination techniques in the swine specie
When fresh or refrigerated semen is used in countryside conditions, the number of spermatozoa and the volume of the dose using PCI can diminish