The influence of delayed breeding on the fertility of beef heifers

Show simple item record De Lange, M.
dc.contributor.editor De Kock, G.v.d.W. 2017-02-06T11:25:30Z 2017-02-06T11:25:30Z 2017 1950
dc.description The articles have been scanned in colour with a HP Scanjet 5590; 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format. en_ZA
dc.description.abstract (1) Twenty-five beef heifers were subjected to delayed breeding up to ages varying from four years to five years eight months. (2) Observations on body-weights, age of sexual maturity, the periodicity and duration of oestrus and the results of mating are recorded. (3) Seven heifers bred successfully, while the remainder showed extensive disturbances in sexual activity. (4) The changes occurring in the genital tract during the normal sexual cycle and during pregnancy are described. (5) Profound functional and structural changes were observed in the genitalia of the majority of animals, leading to abortion, functional sterility, nymphomania and anaphrodisia. (6) Correlative macroscopical and histological changes were observed in the anterior pituitary, thyroid and adrenals of normal and affected animals. (7) The genesis of sterility in relation to delayed breeding in the light of the structural and physiological alterations observed, is discussed. en_ZA
dc.identifier.citation De Lange, M 1950, 'The influence of delayed breeding on the fertility of beef heifers’, Onderstepoort Journal of Veterinary Science and Animal Industry, vol. 24, no.1-2, pp. 125-354. en_ZA
dc.identifier.issn 0330-2465
dc.language.iso en en_ZA
dc.publisher Published by The Government Printer, Pretoria en_ZA
dc.rights © 1950 ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). © 2017 University of Pretoria. Dept. of Library Services (digital). en_ZA
dc.subject Veterinary medicine en_ZA
dc.subject Thesis en_ZA
dc.subject.lcsh Veterinary medicine -- South Africa
dc.title The influence of delayed breeding on the fertility of beef heifers en_ZA
dc.type Article en_ZA

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