| 摘要 |
The present invention generally relates to methods of suppressing estrus in breeding or competitive animals comprising parenterally administering to breeding animals an estrus suppressing amount of 17-alpha-Allyl-17-beta-hydroxyoestra-4,9,11-trien-3-one. According to the method of the present invention, estrus can be suppressed for any of a variety of periods including 30 days or more. Furthermore, the method of the present invention includes repeated sustained release doses for an indefinite period.
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