oestrus

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oestrus

(US), estrus, estrum
a regularly occurring period of sexual receptivity in most female mammals, except humans, during which ovulation occurs and copulation can take place; heat
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
Effect of Jueyin Granules on Mitosis of Vaginal Epithelium at Estrum. In the negative control group, many mitotic cells were observed (2.46 [+ or -] 1.01), with cellular nuclei swelled, condensed, and heavily dyed.
When female rats are under continuous illumination or pinealectomized, the ovarian weight and the incidence of estrum increase (Tamarkin et al., 1985).
(2005) reported that 75 percent of cows were negative for white side test during subsequent estrum after treatment with immunomodulators such as LPS and autologus plasma wheres as Sarma et al.