Staff Publications

Staff Publications

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    'Staff publications' is the digital repository of Wageningen University & Research

    'Staff publications' contains references to publications authored by Wageningen University staff from 1976 onward.

    Publications authored by the staff of the Research Institutes are available from 1995 onwards.

    Full text documents are added when available. The database is updated daily and currently holds about 240,000 items, of which 72,000 in open access.

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Record number 386923
Title Reproductive management in pigs: emphasis on the different roles of the boar and on optimal insemination management
Author(s) Soede, N.M.; Hazeleger, W.; Langendijk, P.; Kemp, B.
Source In: Eläinlääkäri Päivät - Luentokokoelma, Helsinki, Finland, 28-30 October 2009. - Helsinki : Julkaisija Fennovet Oy - p. 122 - 130.
Event Helsinki : Julkaisija Fennovet Oy Eläinlääkäri Päivät - Luentokokoelma, Helsinki, Finland, 2009-10-28/2009-10-30
Department(s) Adaptation Physiology
Publication type Contribution in proceedings
Publication year 2009
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
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