proestrus


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Related to proestrus: metestrus, estrous

proestrus

[prō′es·trəs]
(physiology)
The beginning of the follicular phase of estrus.
References in periodicals archive ?
They were found in proestrus, estrus or metestrus and were considered as reproductive females since there is hormonal stimulation for each phase and a clear indication that they are sexually receptive.
Normally, the estrus cycle in rats lasts 4-5 days (16), but in the present study a high level of progesterone concentration in LDE and HDE groups enhanced the duration of estrous cycles due to longer duration of diestrus phase and shorter duration of estrus and proestrus phases in these groups.
The rotarod test did not denoted effects of drug on motor coordination of rats during the phases of proestrus and diestrus (figure not shown).
For mating purposes, the phase of the estral cycle of each female rat was observed in the morning by means of a vaginal smear, classifying the phase as proestrus (12 h), estrus (14h.
A proestrus smear consists of a predominance of nucleated epithelial cells; an estrus smear primarily shows anucleated cornified cells; a metaestrus smear contains the same proportion among leukocytes, cornified, and nucleated epithelial cells; and a diestrus smear primarily consists of a predominance of leukocytes.
However, two peaks periods of 17[beta]-estradiol were observed for all samples, the first in the metestrus and the second during the proestrus (Fig.
La presencia de celulas nucleadas cornificadas y epiteliales en el moco vaginal dio evidencia de la condicion de proestrus o estrus del ciclo estral [19].