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Having but one estrous cycle in a mating season.
Farlex Partner Medical Dictionary © Farlex 2012
Having an estrous cycle that occurs only once during a single breeding season, usually annually.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.
Having a single estrous cycle in a single sexual season.
Medical Dictionary, © 2009 Farlex and Partners