anestrus

During the winter, many wild animals enter a period of anestrus to conserve energy.

在冬季，许多野生动物进入不动情期以节省能量。

The vet explained that the dog is in anestrus and will not be receptive to mating for several months.

兽医解释说这只狗正处于不动情期，几个月内都不会接受交配。

Unlike humans, most mammals have a distinct anestrus phase between breeding cycles.

与人类不同，大多数哺乳动物在繁殖周期之间有明显的不动情期。