Abstract
Lactation in the sow is characterized by an anestrous period that usually lasts up to 6 wk (Cole et al., 1975). Serum concentrations of luteinizing hormone (LH) are suppressed during lactation (Stevenson et al., 1981; Stevenson and Britt, 1980) while prolactin (PRL) concentrations are elevated (Bevers et al., 1978; Stevenson et al., 1981; Dusza and Krzymowska, 1981). Serum follicle stimulating hormone (FSH) concentrations increase gradually beyond the third week of lactation which appears to be related to a reduction in suckling frequency of the litter (Stevenson et al., 1981). Weaning generally results in an increase in serum LH and FSH (Cox and Britt, 1982; Shaw and Foxcroft, 1985) concentrations and a decrease in serum PRL concentrations (Bevers et al., 1978; van Landeghem and van de Wiel, 1978).
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References
Armstrong JD, Britt JH, Kraeling RR, 1978, Endogenous opioid peptides mediate the effects of suckling on LH during lactation in sows. J Anim Sci 63:Suppl 1 (abstract)
Barb CR, Kraeling RR, Rampacek GB, Whisnant CS, 1986. Opioid inhibition of luteinizing hormone secretion in the postpartum lactating sow. Biol Reprod 35:368–71
Bevers MM, Willemse AH, Kruip Th.AM, Van de Wiel DFM, 1981. Prolactin levels and the LH response to synthetic LH-RH in the lactating sow. Anim Reprod Sci 4:155–63
Cole DJA, Varley MA, Hughes PE, 1975. Studies in sow reproduction 2. The effect of lactation length on the subsequent reproductive performance of the sow. Anim Prod 20:401–06
Cox NM, Britt JH, 1982a. Relationships between endogenous gonadotropin-releasing hormone, gonadotropins, and folliclar development after weaning in sows. Biol Reprod 27:70–78
de Greef WJ, Visser TJ, 1981. Evidence for the involvement of hypothalamic dopamine and thyrophin-releasing hormone in suckling induced release of prolactin. J Endocrinol 91:213–23
Dusza L, Krzymowska H, 1981. Plasma prolactin levels in sows during pregnancy, parturition and early lactation. J Reprod Fert 61:131–34
Gill JL, 1978. Design and analysis of experiments in the animal and medical sciences. Vol. 1. Ames:Iowa State University Press, pp. 176
Guthrie HD, Bolt DJ, 1983. Changes in plasma estrogen, luteinizing hormone, follicle stimulating hormone and 13, 14-dihydro-15-keto prostaglandin F2α during blockade of luteolysis in pigs after human chorionic gonadotropin treatment. J Anim Sci 57:993
Kalra SP, Kalra PS, 1984. Opioid-adrenergic-steroid connection in regulation of luteinizing hormone secretion in the rat. Neuroendocrinology 38:418–26
Kraeling RR, Rampacek GB, Cox NM, Kiser TE, 1982. Prolactin and luteinizing hormone secretion after bromocryptine (CB-154) treatment in lactating sows and ovariectomized gilts. J Anim Sci 54:1212–20
Kraeling RR, Rampacek GB, Kiser TE, 1981. Corpus luteum function after indomethacin treatment during the estrous cycle and following hysterectomy in the gilt. Biol Reprod 25:511–18
Leadem CA, Crowley WR, Simpkins JW and Kalra SP, 1985. Effects of naloxone on catecholamine and LHRH release from the perifused hypothalamus of the steroid-primed rat. Neuroendocrinol 40:497–500
Lutz JB, Rampacek GB, Kraeling RR, Pinkert CA, 1984. Serum luteinizing hormone and estrogen profiles before puberty in the gilt. J Anim Sci 58:686–91
Mattioli M, Conte F, Galeati G, Seren E, 1986. Effect of naloxone on plasma concentrations of prolactin and LH in lactating sows. J Reprod Fert 76:167–73
Neill JD, 1980. Neuroendocrine regulation of prolactin secretion. In: Ganong WF, Martini L (eds.), Frontiers in Neuroendocrinology, Vol. 6. New York: Raven Press, pp. 129–55
Rasmussen DD, Liu JH, Wolf PL, Yen SSC, 1983. Endogenous opioid regulation of GnRH release from human fetal hypothalamus in vitro. J Clin Endocrinol Metab 57:881–84
Riskind PN, Millard WJ, Martin JB, 1984. Opiate modulation of the anterior pituitary hormone response during suckling in the rat. Endocrinology 114:1232–37
SAS, 1982. SAS User’s Guide. Statistical Analysis System Institute, Cary, NC
Shaw JH, Foxcroft GR, 1985. Relationships between LH, FSH and prolactin and reproductive activity in the weaned sow. J Reprod Fert 75:17–28
Sirinathsinghji DJS, Martini L, 1984. Effects of bromocriptine and naloxone on plasma level of prolactin, LH and FSH during suckling in the female rat: Response to gonadotropin releasing hormone. J Endocrinol 100:175–82
Steel RGD, Torrie JH, 1960. Principles and Procedures of Statistics. New York, Toronto, and London: McGraw-Hill
Stevenson JS, Cox NM, Britt JH, 1981. Role of the ovary in controlling luteinizing hormone, follicle stimulating hormone, and prolactin secretion during and after lactation in pigs. Biol Reprod 24:341–53
Stevenson JS, Davis DL, 1984. Influence of reduced litter size and daily litter separation on fertility of sows at 2 to 5 weeks postpartum. J Anim Sci 59:284–93
van Landeghem AAJ, van de Wiel DFM, 1978. Radio immunoassay for porcine prolactin: plasma levels during lactation, suckling and weaning and after TRH administration. Acta Endocr Copenh 88:653–67
Wilkes MM, Yen SSS, 1980. Augmentation by naloxone of efflux of LRF from superfused medial basal hypothalamus. Life Sci 28:2355–59
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© 1987 Plenum Press, New York
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Barb, C.R., Kraeling, R.R., Rampacek, G.B., Leshin, L.S. (1987). Opioid Modulation of Follicle Stimulating Hormone (FSH) and Prolactin (PRL) Secretion in the Postpartum Sow. In: Mahesh, V.B., Dhindsa, D.S., Anderson, E., Kalra, S.P. (eds) Regulation of Ovarian and Testicular Function. Advances in Experimental Medicine and Biology, vol 219. Springer, Boston, MA. https://doi.org/10.1007/978-1-4684-5395-9_36
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DOI: https://doi.org/10.1007/978-1-4684-5395-9_36
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