NDLI: Cystic ovaries in intermittently-suckled sows: follicle growth and endocrine profiles.

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Cystic ovaries in intermittently-suckled sows: follicle growth and endocrine profiles.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Gerritsen, R. Laurenssen, B. F. A. Hazeleger, W. Langendijk, P. Kemp, B. Soede, N. M.
Description	Country affiliation: Netherlands Author Affiliation: Gerritsen R ( Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands.); Laurenssen BF ( Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands.); Hazeleger W ( Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands.); Langendijk P ( Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands.); Kemp B ( Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands.); Soede NM ( Adaptation Physiology Group, Department of Animal Sciences, Wageningen University, PO Box 338, 6700 AH Wageningen, The Netherlands.)
Abstract	This paper presents follicle development and hormone profiles for sows with normal ovulation or cystic follicles during an intermittent-suckling (IS) regime that started at Day 14 of lactation. Sows were subjected to separation from their piglets during blocks of 6h or 12h. In total, 8 out of 52 sows developed cystic follicles; either full cystic ovaries (n=6) or partial ovulation (n=2). Increase in follicle size of these sows was similar to that of normal ovulating sows until pre-ovulatory size at Day 5 after the start of separation, but from then on became larger (P<0.05). LH surge was smaller or absent in sows that developed (partially) cystic ovaries (0.4 ± 0.1 vs 3.6 ± 0.3 ngmL(-1); P<0.01). Peak levels of oestradiol (E2) were similar but high E2 levels persisted in sows that developed (partly) cystic ovaries and duration of oestrus tended to be longer. The risk of developing (partly) cystic ovaries was higher when IS occurred in blocks of 6h versus 12h (33 vs 10%). In conclusion, the appearance of cystic ovaries at approximately Day 20 of ongoing lactation was related to an insufficient LH surge, as is also the case in non-lactating sows.
File Format	HTM / HTML
ISSN	10313613
Issue Number	3
Volume Number	26
e-ISSN	14485990
Journal	Reproduction, Fertility and Development
Language	English
Publisher	CSIRO Publishing
Publisher Date	2014-03-01
Publisher Place	Australia
Access Restriction	Subscribed
Subject Keyword	Discipline Reproductive Medicine Lactation Physiology Ovarian Cysts Metabolism Physiopathology Ovarian Follicle Growth & Development Swine Analysis Of Variance Animals Estradiol Female Luteinizing Hormone Time Factors Comparative Study Journal Article
Content Type	Text
Resource Type	Article
Subject Domain (in MeSH)	Urogenital System Eukaryota Neoplasms Polycyclic Compounds Hormones, Hormone Substitutes, and Hormone Antagonists Investigative Techniques Physical Phenomena Reproductive and Urinary Physiological Phenomena
Subject	Developmental Biology Animal Science and Zoology Molecular Biology Reproductive Medicine Endocrinology Biotechnology Genetics

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