title: Reproductive performance of first parity sows.
abstract: An investigation of the reproductive performance of first parity sows is described. In a retrospective study it was found that the size of the second litter was significantly greater in those sows with a prolonged weaning to oestrus interval of more than 15 days. Deliberately delaying mating until at least 12 days after weaning produced a similar increase in second litter size. This improvement was not associated with an increase in ovulation rate.
mesh_terms: D000818:Animals; D004971:Estrus; D005260:Female; D005313:Fetal Death / Q000453:epidemiology / Q000662:veterinary; D008098:Litter Size; D010060:Ovulation; D010298:Parity; D011247:Pregnancy; D012098:Reproduction; D013552:Swine / Q000502:physiology*; D013553:Swine Diseases / Q000453:epidemiology; D013997:Time Factors; D014886:Weaning