| 1. | A cow's estrus cycle averages 21 days .
母牛的发情周期平均为21天。 |
| 2. | The next estrus was delayed .
下一次发情推迟了。 |
| 3. | In cows and many other animals, the female is in estrus just before ovulation .
母牛和许多其他的雌性动物都正好是在排卵前发情。 |
| 4. | Synchronized estrus disposal of recipient on sheep embryo transfer
绵羊胚胎移植受体同期发情处理技术研究 |
| 5. | During estrus , the female is fertile and will accept a male
在发情期，母犬可以接受交配并且具有生育能力。 |
| 6. | Estrus recurs at intervals of approximately six months until late in life
从一个发情期至第二个发情期之间约为六个月。 |
| 7. | Study of reproductive hormone on the synchronization of estrus of small - tail sheep
应用生殖激素对小尾寒羊同期发情效果研究 |
| 8. | 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发情内分泌机理的研究 |
| 9. | Typically , it occurs about 1 to 2 months after estrus , or when the cat comes into heat
母猫在进入发情期后的一到两个月，或者是开始发情时，特别容易出现这种病症。 |
| 10. | A female comes into estrus a week or two after giving birth and , if she is not fertilized then , again about a month later
生产后的雌马会在1 ~ 2周后进入发情期，如果这段时间没有怀孕，大约一个月后会再发情一次。 |
