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FOETAL PLASMA CORTICOSTEROIDS AND THE INITIATION OF PARTURITION IN SHEEP
Abstract
Abstract Prolonged pregnancy following foetal hypophysectomy or adrenalectomy (Liggins, Kennedy & Holm, 1967; Drost & Holm, 1968) and premature parturition following injection of corticotrophin or corticosteroids into the ovine foetus (Van Rensburg, 1967; Halliday & Buttle, 1968; Liggins, 1968) implicate the foetal adrenal cortex in the initiation of parturition in sheep. Consequently, foetal plasma corticosteroid concentrations and corticosteroid secretion by the foetal adrenal should be greatly increased towards term. Observations during acute studies on anaesthetized sheep suggest this (Alexander, Britton, James, Nixon, Parker, Wintour & Wright, 1968), but there is no information about blood concentrations or secretion rates of corticosteroids in normal undisturbed sheep foetuses in utero. We cannulated the carotid artery and the facial branch of the jugular vein of four single Merino foetuses with polyvinyl chloride tubing (o.d. 1·27 mm., i.d. 0·86 mm.) with the ewes under general anaesthesia (pentobarbitone sodium (20 mg./kg., i.v.) followed by halothane and oxygen).
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Citations
Cited by
Endocrine and Paracrine Regulation of Birth at Term and Preterm*
Challis, J. R. G., Matthews, S. G., Gibb, W., & Lye, S. J. (2000) · Endocrine Reviews · doi:10.1210/edrv.21.5.0407 · Cited by 995
Respiratory movements and rapid eye movement sleep in the foetal lamb.
Dawes, G. S., Fox, H. E., Leduc, B. M., Liggins, G. C., & Richards, R. T. (1972) · The Journal of Physiology · doi:10.1113/jphysiol.1972.sp009698 · Cited by 561
Time-Trend Analysis of Plasma Cortisol Concentrations in the Fetal Sheep in Relation to Parturition*
MAGYAR, D. M., FRIDSHAL, D., ELSNER, C. W., GLATZ, T., ELIOT, J., KLEIN, A. H., LOWE, K. C., BUSTER, J. E., & NATHANIELSZ, P. W. (1980) · Endocrinology · doi:10.1210/endo-107-1-155 · Cited by 189
Hillhouse, E. W., Grammatopoulos, D., Milton, N. G., & Quartero, H. W. (1993) · The Journal of Clinical Endocrinology & Metabolism · doi:10.1210/jcem.76.3.8383145 · Cited by 110
Metadata
- Authors
- BASSETT, J. M., & THORBURN, G. D.
- Venue
- Journal of Endocrinology
- Publisher
- Bioscientifica
- Published
- 1969-06
- Volume
- 44
- Issue
- 2
- Pages
- 285-286
- ISSN
- 0022-0795 (ISSN-L)
- 1479-6805
- OpenAlex
- W2088822461
- Cited by
- 267
- References
- 0
- FWCI
- 28.79
- Type
- journal article
- Language
- en
- Open access
- closed
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- BASSETT, J. M., & THORBURN, G. D. (1969). FOETAL PLASMA CORTICOSTEROIDS AND THE INITIATION OF PARTURITION IN SHEEP. Journal of Endocrinology. https://doi.org/10.1677/joe.0.0440285
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
