oestrus
Noun
Meaning
A genus of gadflies. The species which deposits its larvae in the nasal cavities of sheep is oestrus ovis.
A vehement desire; esp. (Physiol.), the periodical sexual impulse of animals; heat; rut.
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Domestic dogs and certain small canids in captivity may come into oestrus more frequently, perhaps because the photoperiod stimulus breaks down under conditions of artificial lighting.
Hera then sent a gadfly (Greek oistros, compare oestrus ) to sting Io as she wandered the earth.
Dominant males may try to sequester a female for her entire oestrus period of approximately two weeks but usually are unable to retain her for the entire time.
Females are polyoestrus they have an oestrus ("heat") cycle every 12 days (this can vary from 10 to 20 days), citation open access publication - free to read each oestrus lasting one to three days.
Postpartum amenorrhea (absence of menstruation) lasts less than one year and a female may resume external signs of oestrus within a year of giving birth, though the female is probably not fertile at this point.
Reproduction Springbok mate year-round, though females are more likely to enter oestrus during the rainy season, when food is more plentiful.