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Factors Affecting Ovarian Activity of Pigs

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veterinary

	__________________________Stage of Breeding Affected____________________________
Proven or Suspected Factors	Puberty	After Weaning	After Service
Insufficient male stimulation	✓	✓
Housing and social environment	✓	✓	✓
High ambient temperature	✓	✓	✓
Season of year (summer/autumn)	✓	✓	✓
Photoperiod	✓	?
Genotype	✓	✓
Nutrition	✓	✓	✓
Short lactation		✓
Large litter reared		✓
Adapted, with permission, from Meredith MJ, Pig News and Information 5, 1984, published by CAB International, Wallingford, Oxon, UK.