Early embryo survival and development in sows with lactational ovulation

Reproduction in Domestic Animals = Zuchthygiene
R GerritsenB Kemp

Abstract

During lactation, daily separation of sow and piglets, intermittent suckling (IS), can induce lactational oestrus and ovulation. This study examined effects of IS on subsequent early embryo survival and development. Multiparous Topigs40 sows were separated from their piglets for either 12 consecutive hours per day (IS12, n = 13) or two times for 6 h per day (IS6, n = 10) from day 14 of lactation onwards until 23 days after ovulation. Control sows (C, n = 17) were weaned at day 21 of lactation. Oestrus was shown in all treatments within 5 days after the start of treatment. Sows were inseminated each day of oestrus and slaughtered at D23 after ovulation. Intermittent suckling did not significantly affect pregnancy rates of sows (75% IS12 vs 78% IS6 vs 94% C; p > 0.10). Embryo survival was not significantly affected by IS (IS12: 57%; IS6: 51%; p > 0.10) although it seemed to be lower than in C sows (70%). Some parameters of embryo, placental and uterine development were affected by IS, especially in the IS6 group. IS6 embryos had shorter placentas (17.5 +/- 1.2 cm; p < 0.05) than C (20.3 +/- 1.4 cm) and IS12 sows (20.9 +/- 0.7 cm) were smaller and less developed than C sows (p < 0.05). In conclusion, embryo survival does not seem ...Continue Reading

References

Aug 1, 1992·Acta Endocrinologica·A J ZiecikS J Rzucidlo
Jan 1, 1974·Journal of Animal Science·A J SvajgrR H Dutt
Jan 1, 1983·Journal of Reproduction and Fertility·S Edwards, G R Foxcroft
Mar 1, 1996·Journal of Animal Science·R JindalG R Foxcroft
Jun 30, 2005·Animal Reproduction Science·M Y C Thaker, G Bilkei
Jan 24, 2006·Animal Reproduction Science·N M SoedeB Kemp
Dec 21, 2006·Journal of Animal Science·M BerkeveldJ H M Verheijden

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Citations

Sep 21, 2013·Animal Reproduction Science·Robyn TerryWilliam H E J van Wettere
Feb 23, 2020·Animals : an Open Access Journal From MDPI·Sophia A WardKate J Plush

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