A cow's estrus cycle averages 21 days . 母牛的發(fā)情周期平均為21天。
The next estrus was delayed . 下一次發(fā)情推遲了。
In cows and many other animals, the female is in estrus just before ovulation . 母牛和許多其他的雌性動物都正好是在排卵前發(fā)情。
Synchronized estrus disposal of recipient on sheep embryo transfer 綿羊胚胎移植受體同期發(fā)情處理技術(shù)研究
During estrus , the female is fertile and will accept a male 在發(fā)情期,母犬可以接受交配并且具有生育能力。
Estrus recurs at intervals of approximately six months until late in life 從一個發(fā)情期至第二個發(fā)情期之間約為六個月。
Study of reproductive hormone on the synchronization of estrus of small - tail sheep 應(yīng)用生殖激素對小尾寒羊同期發(fā)情效果研究
Study on endocrine basis of prolificacyand non - seasonal estrus in small tail han sheep 小尾寒羊高繁殖力和常年發(fā)情內(nèi)分泌機理的研究
Typically , it occurs about 1 to 2 months after estrus , or when the cat comes into heat 母貓在進入發(fā)情期后的一到兩個月,或者是開始發(fā)情時,特別容易出現(xiàn)這種病癥。
A female comes into estrus a week or two after giving birth and , if she is not fertilized then , again about a month later 生產(chǎn)后的雌馬會在1 ~ 2周后進入發(fā)情期,如果這段時間沒有懷孕,大約一個月后會再發(fā)情一次。