- Pancreas
- Parasite
- Paternal line
- Pathogens
- pedaling
- Penicillin
- Penis
- Percentage of slaughtered sows
- Percentage of sows that die annually
- Pharynx
- Pheromones
- Pig holder
- Piglets born alive per litter
- Placenta
- Pneumonia
- Pre-weaning mortality
- Pregnancy (gestation)
- Present sows
- Prestarter feed
- Productive sows
- Prolificacy
- Protein
- Puberty
- Pure breed
- Pure line