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A Study of the timing and duration of oestrus in sows post-weaning and of problems at mating

Published online by Cambridge University Press:  24 November 2017

Huang ,
Wen-Yu ,
J Behan ,
L Beveridge ,
C Rodrigo ,
J H Dunne ,
J S M Hutchinson ,
O Macpherson ,
J A Roden  and
P R English
Huang
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
Wen-Yu
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
J Behan
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
L Beveridge
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
C Rodrigo
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
J H Dunne
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
J S M Hutchinson
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
O Macpherson
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
J A Roden
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
P R English
Affiliation:
School of Agriculture, University of Aberdeen, 581 King Street, Aberdeen AB9 1UD
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Extract

General recommendations are made (e.g. Gomes, 1977; Dzuik, 1970) that, in order to achieve maximum conception rate and litter size, sows should be mated or inseminated 9 to 15 hours prior to ovulation and that this coincides with an interval of 30 to 36 hours after the start of standing oestrus (SO). This assumes that sows will be in standing oestrus for around 48 hours. Surprisingly little data is available on the length of SO In modern sows on current production systems. Accordingly length of SO was determined in a large commercial herd weaning at around 3 weeks of age.

A team of observers determined the start, completion and duration of SO in 101 multi parity sows. The sows were tested for SO daily from weaning at 8 hourly intervals (00.00, 08.00 and 16.00 hr) until the end of SO by taking sows individually from their small post-weaning groups to an oestrus checking area. Boars were penned around this area and SO was checked using the back pressure test.

Type
Pigs
Information
Proceedings of the British Society of Animal Production (1972) , Volume 1992 , March 1992 , pp. 128
Copyright
Copyright © The British Society of Animal Production 1992

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