| Daily injections of a pineal extract prevented permanent estrus and kept estral cyclicity going despite constant exposure to light. |
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| Three rut detection methods were compared, being the most effective that of vasectomized buffalos, and there were established the most important features of estrus and estral cycle. |
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| The presence of spermatozoids was considered indicative of pregnancy, associated with the diagnosis of the estrous phase of the estral cycle. |
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| Without being chased by a bull, very excited estral cows made sudden 10-15 km trips. |
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| Estral will continue its current operations pending disposition. |
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