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Type: Journal article
Title: Controlling lactation oestrus: the final frontier for breeding herd management
Author: van Wettere, W.
Weaver, A.
Greenwood, E.
Terry, R.
Hughes, P.
Kind, K.
Citation: Molecular Reproduction and Development, 2017; 84(9):883-896
Publisher: Wiley
Issue Date: 2017
ISSN: 1040-452X
Statement of
William H.E.J. van Wettere, Alice C. Weaver, Emma C. Greenwood, Robyn Terry, Paul E. Hughes, Karen L. Kind
Abstract: Lactation anoestrus limits the flexibility of modern pig production systems such that any increase in lactation length reduces farrowing frequency, and thus profit. This review focuses on post-partum development of the sow's reproductive system, the physiology of lactation anoestrus and how it can be overcome, as well as the fertility of sows mated while lactating. The propensity for sows to ovulate spontaneously while lactating is high (24-31%), and a high proportion of sows will ovulate rapidly and synchronously in response to combinations of altered suckling (split weaning, interrupted suckling), daily boar contact, exogenous gonadotrophins, and group housing. The apparent ease with which lactation anoestrus can be overcome represents an opportunity to uncouple sow mating from weaning, thus reducing the impact of lactation length on productivity. This is especially true when considering the benefits of the described stimulation methods on the reproductive performance (i.e., shorter weaning to oestrus intervals and higher litter sizes) of the low proportion of sows that maintain lactation anoestrus.
Keywords: Fertility; lactation oestrus; sow
Rights: © 2017 Wiley Periodicals, Inc.
RMID: 0030071691
DOI: 10.1002/mrd.22838
Appears in Collections:Animal and Veterinary Sciences publications

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