What are the signs that hens crow like roosters?

It turns out that there is an idiom "A hen crows at dawn, like a rooster". Feudal society once described women's usurpation of power as a sign of disaster.

Scientific answer: It has something to do with the physiological structure of chickens. Hens have developed ovaries on the left and underdeveloped gonads on the right. For some special reasons, when the right gonad develops, the hen will crow.

There are many hermaphroditic animals in the world, and hens will only become one of them if they are stimulated unexpectedly, so don't pay too much attention. Otherwise, how can the hippocampus father who gave birth to the baby be embarrassed?