Merck Manual

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Factors Affecting Ovarian Activity of Pigs

Factors Affecting Ovarian Activity of Pigs

Stage of Breeding Affected

____________________________________________________________

Proven or Suspected Factors

Puberty

After Weaning

After Service

Insufficient male stimulation

+a

+

b

Housing and social environment

+

+

High ambient temperature

+

+

+

Season of year (summer/fall)

+

+

+

Photoperiod

+

?c

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.

a Effect has been demonstrated

b No evidence for effect

c Effect uncertain