Reproductive management in pigs: emphasis on the different roles of the boar and on optimal insemination management

N.M. Soede, W. Hazeleger, P. Langendijk, B. Kemp

Research output: Chapter in Book/Report/Conference proceedingConference paperAcademic

Abstract

Boars have different roles in the reproductive management in pigs. Boar contact can stimulate follicle development and thereby induce oestrus, both in gilts and sows. Boar contact during oestrus is essential for good oestrus expression, which is essential for the correct timing of insemination and the proper use of boar contact during insemination can stimulate sperm transport and thereby fertilisation. Stimulation by boars clearly has an olfactory component (the boar smell), but can also have an auditory, visual and evn tactile component. The background of the different roles and some of these different components of the boar are discussed. To enable a good farrowing rate and litter size, sows should be inseminated between 0 and 24h before ovulation. However, it is not possible to accurately predict the time of ovulation in sows. Although ovulation takes place at a relatively fixed 60-75% of the duration of oestrus, the duration of oestrus varies considerably between sows and between farms, resulting in a variable ovulation time from onset of oestrus. Therefore, most farmers inseminate their sows every day of oestrus to ensure insemination within the optimal period. Since post-ovulation inseminations should be avoided, it is adviced to only inseminate sows while they still show an optimal standing response
Original languageEnglish
Title of host publicationEläinlääkäri Päivät - Luentokokoelma, Helsinki, Finland, 28-30 October 2009
Place of PublicationHelsinki
PublisherJulkaisija Fennovet Oy
Pages122-130
Publication statusPublished - 2009
EventEläinlääkäri Päivät - Luentokokoelma, Helsinki, Finland -
Duration: 28 Oct 200930 Oct 2009

Conference

ConferenceEläinlääkäri Päivät - Luentokokoelma, Helsinki, Finland
Period28/10/0930/10/09

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