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https://hdl.handle.net/2440/104827
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Type: | Journal article |
Title: | Embryonic survival at day 9, 21 and 35 of pregnancy in intact and unilaterally oviduct ligated multiparous sows |
Author: | Langendijk, P. Chen, T. Athorn, R. Bouwman, E. |
Citation: | Animal: the international journal of animal biosciences, 2016; 10(8):1336-1341 |
Publisher: | Cambridge University Press |
Issue Date: | 2016 |
ISSN: | 1751-7311 1751-732X |
Statement of Responsibility: | P. Langendijk, T.Y. Chen, R.Z. Athorn and E.G. Bouwman |
Abstract: | To investigate the effect of uterine space on timing of embryonic mortality, multiparous sows were left intact (CTR; n=42) or subjected to unilateral oviduct ligation (LIG; n=23), after their first post wean oestrus. Intact sows were killed at day 9 (n=10), day 21 (n=15), or day 35 (n=17), and LIG sows were killed at day 21 (n=11) or day 35 (n=12) of gestation. At day 9, 92% of ovulations were represented by an embryo. At day 21, embryonic mortality was 24% and was not altered by increasing uterine space. At day 35, space per embryo was twice as large in LIG sows (30±3 v. 16±0.8 cm), and implantation length tended to be larger (19.0±1.2 v. 15.5±1.3 cm). Between day 21 and day 35, CTR sows lost another 8% to 14% of their embryos, whereas LIG sows lost none. Embryos tended to be heavier (4.9±0.2 v. 4.3±0.3 g) in LIG sows. In conclusion, embryonic loss in multiparous sows is 24% by day 21 and is not related to space, whereas after day 21 limited space causes additional 8% to 14% embryonic mortality in intact sows only. |
Keywords: | Sows; uterine; crowding; embryo; survival |
Rights: | © The Animal Consortium 2016 |
DOI: | 10.1017/S175173111600029X |
Published version: | http://dx.doi.org/10.1017/s175173111600029x |
Appears in Collections: | Animal and Veterinary Sciences publications Aurora harvest 8 |
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