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Published online by Cambridge University Press: 20 November 2017
The ovarian status of the donor animal before and at the time of gonadotrophin treatment appears to be a major determinant of superovulatory response in cattle. Transrectal ultrasonography is a non-invasive means of assessing the morphological status of the ovary which can be used on a repeated basis. Detailed evaluation of ovarian status by this means may enable superovulatory treatment protocols to be devised which are tailored to the individual donor animal. This possibility was evaluated in a preliminary study reported here.