Reproduction, bull semen.
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History was made on January 5, 1955 when a consignment of 100 cc of deep frozen bull semen reached Perth from London. This was the first consignment of deep frozen semen to be imported into Western Australia. It was procured from the Milk Marketing Board in Great Britain by the South-West Co-operative dairy Farmers Ltd.' Bunbury on the behalf of Mr. R. B. Lefroy, of Waterloo, for the insemination of his dairy herd of 50 milking shorthorn cows.
"Importation of deep-frozen bovine semen,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 4
, Article 26.
Available at: https://researchlibrary.agric.wa.gov.au/journal_agriculture3/vol4/iss2/26