Abstract
CESSATION of cyclic ovarian activity in ewes during anœstrus is thought to be associated with changes in the level and/or type of gonadotrophic substances reaching the ovary1. This supposition cannot be tested by direct means at the present time, but a recently developed technique for synchronization of ovulation in ewes2 suggests possibilities of an indirect examination.
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References
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LAMOND, D. Seasonal Differences in Ovulating Hormone in the Merino Ewe. Nature 186, 971–972 (1960). https://doi.org/10.1038/186971b0
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DOI: https://doi.org/10.1038/186971b0
