anestrus


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Related to anestrus: proestrus, monoestrous

an·es·trus

(an-es'trŭs),
The period of sexual quiescence between the estrus cycles of mammals; may be: 1) a prolonged period in monestrous animals (dogs) or seasonally polyestrous animals (sheep), or 2) a prolonged period of failure of estrus in mature nonpregnant, polyestrous animals.
[G. a- priv. + oistros, a gadfly, mad desire (estrus)]
Farlex Partner Medical Dictionary © Farlex 2012

anestrus

(ăn-ĕs′trəs)
n.
An interval of sexual inactivity between two periods of estrus in female mammals that breed cyclically.
The American Heritage® Medical Dictionary Copyright © 2007, 2004 by Houghton Mifflin Company. Published by Houghton Mifflin Company. All rights reserved.

an·es·trus

(an-es'trŭs)
The period between two estrus (heat) cycles.
Synonym(s): anoestrus.
[G. a- priv. + oistros, a gadfly, mad desire (estrus)]
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
References in periodicals archive ?
Custer, "Physiological mechanisms controlling anestrus and infertility in postpartum beef cattle," Journal of Animal Science, vol.
Toward the end of anestrus, circulating concentrations of LH begin to increase due to onset of a high-frequency mode of pulsatile LH secretion.
Since the mare is usually in winter anestrus, artificial lighting is used to induce follicular activity.
* Monestrous (mohn-ehs-truhs) One estrous cycle each year, followed by a period of anestrus.
Montiel F, Ahuja C (2005) Body condition and suckling as factors influencing the duration of postpartum anestrus in cattle: a review.
of anestrus, the period between heats in female animals
Depending on the breed, they may then enter an anestrus period that lasts until the start of the next breeding season.
The technology is also used to treat anestrus beef cows that do not cycle because the physical demands of a suckling calf cause a negative energy balance.
[E.sub.2] and [P.sub.4] concentrations of females with cubs and females with yearlings did not differ, presumably because all females with nursing offspring (cubs and yearlings) are in lactational anestrus. The two groups were thus pooled into one group (n = 54) to study relationships between the independent factors and [P.sub.4].
However, limited amounts of data are available concerning the effects of exogenous hormones, such as melatonin (MEL) and progesterone ([P.sub.4]), on oocyte quality for in vitro production (IVP) of embryos during seasonal anestrus. The aim of this study was to evaluate the effects of MEL and controlled internal drug release (CIDR) device on follicular development and oocyte quality in FSH- treated ewes.
The anestrus period may be correlated with the strength of Calanus copepod production, as it appears to be in northern right whales (Balaena glacialis; Kenney, 1997, 1998).