PlanetCatfish.com

I would like to know if the catfish has a cycle like th female humans do??

---Dor

As the human female cycle has to do with preparing for an eventually pregnancy, and most catfish don't get pregnant, they don't cycle this way

This being said, many fish do have breeding cycles such as one spawning a year

The answer is quite generalized, as you did not refer to any catfish in particular. Should you wish more precise answers, refrase your querie - and wait for the real knowledgeble people

Right, this is actually covered in the FAQ, sort of:
Here

However, as Bas hints, there are "cycles" in breeding fish too. For all egglaying species, it's obviously necessary to produce eggs. The eggs can be quite numerous, and it usually takes a few weeks [under good feeding conditions] to produce the eggs.

In many cases, the fish only naturally breed under a specific time of the year. For some fish, the time of year itself is important (using some sort of "body-clock"), for other fish, weather conditions (such as rain making the water cooler and "cleaner") will get the fish ready to spawn.

Edit: Just because a species "breeds at a certain time of year" doesn't mean that they can't breed multiple times during that part of the year. The "breeding season" may last for a few months, and under the right conditions, a male and a female may produce several spawns during thise time.

--
Mats