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Synchronization of estrus has many advantages but .

同期发情有很多好处,但是。

Estrus season is very intense competition for a spouse , each group only the capacity of an adult male horse there .

发情季节争夺配偶十分激烈，每群中仅容1只成年雄马存在。

The female dog reaches sexual maturity at 6-8 months of age , and has two estrus cycles per year .

母狗在6-8月达到性成熟,而且每年有二次发情期。

The next estrus was delayed .

下一次发情推迟了。

You still need to conduct estrus detection .

你仍然需要进行发情监控。