Quin, J.I.Van der Wath, J.G.Du Toit, P.J.2017-03-082017-03-0820171943Quin, JI & Van der Wath, JG 1943, 'The effects of diethyl-stilboestrol and pregnant mare serum on the oestrous cycle of merino ewes’, Onderstepoort Journal of Veterinary Science and Animal Industry, vol. 18, nos. 1 & 2, pp. 139-147.0330-2465http://hdl.handle.net/2263/59325The 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.From the observations made on: normal ewes as well as on spayed ewes following treatment with stilboestrol and pregnant mare serum, evidence is presented showing that seasonal anoestrus in merino ewes is closely associated with a decreased physiological response of the uterus and vagina to oestrogens.en© 1943 ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). © 2017 University of Pretoria. Dept. of Library Services (digital).Veterinary medicineVeterinary medicine -- South AfricaArticle