Estimation of sperm concentration limits to produce intrauterine insemination doses in swine.

This study evaluated the effect of sperm concentration of boar semen doses, for intrauterine artificial insemination (IUAI), on semen quality and established concentration limits for their production. Twenty ejaculates from four crossbred mature PIC boars were collected to produce 50 mL semen doses in a split sample, reaching the following sperm concentrations: ~20, 30, 60, and 100 × 10  cells/mL. Doses were produced using Androstar Plus, stored at 17°C, and evaluated until 120 h of storage.