estrous cycle

The recurrent set of physiological and behavioral changes that take place from one period of estrus to another.

American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

es′trous cy`cle

a series of physiological changes in sexual and other organs in female mammals, extending from one period of heat to the next.

[1895–1900]

es·trous cycle

(ĕs′trəs)

The series of bodily changes that occur in the female of most mammals from one period of estrus to another. The estrous cycle usually takes place during a specific period known as the breeding season, which ensures that the young are born at a time when the chance of survival is greatest. The length of the cycle varies from species to species.

The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

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References in periodicals archive

The rodent estrous cycle: characterization of vaginal cytology and its utility in toxicological studies.

Reproductive toxicity of a mixture of regulated drinking-water disinfection by-products in a multigenerational rat bioassay

However, sex differences can be studied in relation to the possible effect of the estrous cycle. In this sense, the evidence appears to be contradictory.

Social interaction and conditional self-discrimination under a paradigm of avoidance and positive reinforcement in Wistar rats/Interaccion social y auto-discriminacion condicional bajo un paradigma de reforzamiento positivo y evitacion en ratas Wistar

These older bucks play a direct role in an earlier and shorter rut in the South, and a better chance of breeding occurring during the first estrous cycle in the North.

Antler restrictions: good or bad? This controversial method of restricting the deer harvest works!

Synchronization treatments were initiated on days8-10 of the estrous cycle with a single intramuscular (IM)injection of respective doses of eCG (2, 2.5, 3, 3.5 or 4IU/kg) in five different groups, followed by intramuscular administration of PGF2?

Influence of Different Doses of Equine Chorionic Gonadotropin on Follicular Population and Plasma Estradiol Concentration in Chinese Holstein Dairy Cows

Holyoak, "The influence of the phase of the estrous cycle on sheep endometrial tissue response to lipopolysaccharide," Journal of Animal Science, vol.

Compensatory structural adaptive modifications of vagina in response to functional demand in goat

Ovarian steroids have also been demonstrated to affect PG during the estrous cycle in vivo in the mare [1, 2].

Interleukins affect equine endometrial cell function: modulatory action of ovarian steroids

A concurrent increase of moonlight now provides the double trigger that sets off a doe's estrous cycle. With odor-detecting capabilities vastly transcending ours, bucks react immediately.

It's time for deer to get passionate

activity by sex and estrous cycle stage in the cingulate cortex and mediodorsal thalamus were found (Arias, Alvarez, Conejo, Gonzalez-Pardo, & Arias, 2010).

Sexual metabolic differences in the rat limbic brain

Serum concentrations of prolactin, thyroxine and triiodothyronine relative to season and the estrous cycle in the mare.

Assessment of progesterone, cortisol and thyroxine serum concentrations on different phases of estrous cycle in mares /Concentracoes sericas de progesterona, cortisol e tiroxina nas diferentes fases do ciclo estral de eguas/Evaluacion de progesterona, la tiroxina y concentraciones de cortisol serico en diferentes fases del ciclo estral en yeguas