estral cycle


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Related to estral cycle: estrous cycle

estral cycle

n.
The estrous cycle.
References in periodicals archive ?
Recent reports indicate that vaginal wall impedance readings are a reliable alternative in the determination of estrous cycle stage (3,5,9), since many species including the rat present variations in the inherent electrical resistance of the vaginal wall during the estral cycle (9,10,12).
The levels vary according to the different phases of the estral cycle of the rat (Johnson et al.
After an adaptation period, vaginal varnish were gathered to determine regular estral cycle.
It is known that in female rats, melatonin blood levels, vary according to the different phases of estral cycle (Reiter, 1993); and factors such as; age, season of the year, origin of the animals, as well feeding conditions and luminosity, that may provoke variations in the estral cycle of rats (Jaworski, 1950; Gronroos & Kauppila, 1959; Glickstein et al.