Hexoestrol implants, Yearlings, Growth hormones.
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THE implantation of pellets containing the growth-promoting hormone, hexoestrol, into the ears of cattle being prepared for slaughter is common practice in the United States of America. In the United Kingdom also, its use is becoming increasingly popular with beef producers. Research in these countries has shown that increased liveweight gains and more efficient feed conversion can be expected at very little cost.
"Hexoestrol implants with yearling steers,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 8:
2, Article 14.
Available at: https://library.dpird.wa.gov.au/journal_agriculture3/vol8/iss2/14