Table 3 Semen handling factors affecting boar semen quality

Latex gloves.

Toxic for the sperm

[76]

Preputial liquid into the collection container

Increases bacteriospermia

[68]

Collection longer than 7 min,

Increases bacteriospermia

[68]

Final dilution at 22 °C vs 30 °C (2-step dilution)

No differences in sperm motility, morphology or acrosome integrity after 3 days storage

[14]

Final dilution at 20 °C vs 32 °C (2-step dilution)

No differences on membrane integrity or responsiveness to capacitating conditions

[82]

Final dilution at 21 °C vs 32 °C (2-step dilution)

Lower motility, increased membrane damage after 6 days storage

[80]

0.5 × 10⁹ sperm/80 ml vs 2.5 × 10⁹/80 ml

Lower motility

[83]

Short vs long

Lower motility after 4 days storage

[15]^a

Magnetized extender

Improve membrane integrity

[88]

Antibiotics

Prevent bacterial overgrowth

[92]

Bags vs tubes.

Need less time to reach 17 °C

[96]

Some plastic compounds

Toxic for sperm

[97]

< 12 °C

Reduced sperm motility and vitality

[78]

> 4 days

Reduced motility and fertility

[15, 86]

Air contact during storage

Increase in pH, reduced sperm motility

[101]

180° rotation/12 h or five 360° rotations/h vs. non-rotated tubes, using

Increase in pH, reduced sperm motility

[102]