| 词汇 | estrus |
| 释义 | estrus noun[ U ] biology specialized(UK alsooestrus)uk /ˈiː.strəs/ us /ˈes.trəs/ the time when a female animal is fertile(= able to become pregnant) and willing to mate(= have sex): （雌性动物）发情期，求偶期 The female panda is in estrus for only 24 to 48 hours per year.雌性熊猫每年只有24到48个小时处于发情期。 Just before the mother seal departs for the sea, she comes into oestrus and mates. See also estrous cycle Compare on heatUK Suckling prevents cows from entering estrus. In a number of mammals, the vagina may be sealed when the animal is not sexually receptive and only open during oestrus. In many mammals, oestrus lasts a short time: just 48 hours in the mountain goat. Animal reproduction androgen anti-oestrogen asexuality asexually barrenness calve fertile impregnate oestrogen ovulate panmictic panmixia procreate procreation procreative propagation rut semen spawn sterile |
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