Ovarian Follicle Growth during Lactation Determines the Reproductive Performance of Weaned Sows

Animals : an Open Access Journal From MDPI
Tania P LopesJordi Roca

Abstract

Factors causing variability in ovarian follicle size among weaned sows are not well known. This field study aimed to disclose influencing factors and evaluate if the differences at weaning were established during lactation. Ovaries were scanned using transrectal ultrasound. The first experiment was conducted over a year with 191 randomly chosen sows that were hierarchically grouped (p < 0.001) according to ovarian follicle diameter reached at weaning: Small (0.20-0.30 cm; n = 37), medium (0.31-0.39 cm; n = 75), and large (0.40-1.00 cm; n = 69). Sows with small follicles showed a higher incidence of post-weaning anestrus (p < 0.01), longer wean-to-estrus/ovulation intervals (p < 0.01) and farrowing smaller litters (p < 0.05). Ovaries with small follicles were more common among sows weaned in summer-autumn than in winter-spring (p < 0.01) and among sows of lower parity (1-3) (p < 0.05). In the second experiment, with 40 sows randomly chosen at farrowing, the ovaries were scanned at 7, 14, and 21 d post-partum. Sows showed great variability in ovarian follicular size during lactation with a consistent relationship between the three measurement times (r = 0.84, p < 0.01). Follicle size was smaller in sows nursing in summer-autumn t...Continue Reading

References

Nov 11, 1978·The Veterinary Record·R J Love
Dec 1, 1985·Experimental and Clinical Endocrinology·T E CurryH W Burden
Apr 28, 2000·Journal of Animal Science·P LangendijkB Kemp
Jun 23, 2001·Molecular and Cellular Endocrinology·S G Hillier
May 10, 2002·The Journal of Veterinary Medical Science·Yuzo Koketsu
Jan 24, 2006·Animal Reproduction Science·N M SoedeB Kemp
Nov 29, 2007·Reproduction in Domestic Animals = Zuchthygiene·J KauffoldM Wähner
Aug 8, 2008·Animal Reproduction Science·Alfonso BolarinJordi Roca
Sep 24, 2009·Theriogenology·A G Kongsted, J E Hermansen
Oct 5, 2010·Reproduction, Fertility, and Development·M BertoldoC G Grupen
Mar 9, 2011·Animal Reproduction Science·M J BertoldoC G Grupen
Nov 19, 2011·Genetics and Molecular Research : GMR·C D S LeiteD N M Alves
Oct 31, 2013·Advances in Experimental Medicine and Biology·Robert V Knox
Aug 9, 2015·Theriogenology·R V Knox
Jan 3, 2016·Theriogenology·J RocaH Rodriguez-Martinez
May 24, 2017·Theriogenology·Fabio De RensisRoy N Kirkwood
Jul 10, 2018·Animal : an International Journal of Animal Bioscience·N G J CostermansN M Soede
Jul 19, 2018·Animal : an International Journal of Animal Bioscience·A LaveryD P Berry
Dec 16, 2018·Journal of Animal Physiology and Animal Nutrition·Ping HuWeiyun Zhu
Nov 14, 2019·Animals : an Open Access Journal From MDPI·Johannes KauffoldGary C Althouse
Dec 18, 2019·Journal of Animal Science and Technology·Alejandra Amavizca-NazarAraceli Pinelli-Saavedra
Jan 30, 2020·Animal : an International Journal of Animal Bioscience·T HanO A T Peltoniemi

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Nov 1, 2020·Animals : an Open Access Journal From MDPI·Tania P LopesJordi Roca

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