The estrus period of female cats usually lasts 3 to 6 days. Female cats will go into estrus every two or three weeks, and each time will last for 3 to 6 days. The above is an approximate average, and there are differences. There are a few exceptions even during the mating season, but the cycles after estrus are similar. If a cat is not mated while in heat, the cat will return to heat soon, with an interval of about two to three weeks. If the cat is in estrus for a long time without mating, the period between estrus will be shortened, and it will appear as if the cat is in estrus non-stop.

Characteristics of female cats in estrus:

1. Owners will find that normally aloof cats will become more clingy during estrus and like to be around their owners. Scrubbing around, or lying on the floor twisting around. These are all estrus behaviors.

2. Female cats in estrus often meow. The sounds of cats in estrus will change, some sound like a baby, and some have a very low and hoarse sound.

3. Female cats will urinate frequently and tempt male cats. I want to expand my aura so that more cats of the opposite sex can find it smoothly.

4. The female cat will often raise her buttocks and crawl on the ground with her two legs behind her and the front end of her body, in a posture waiting for mating. If the owner touches the back with his hands, the female cat will become submissive and lower its back.

5. The female cat’s vagina appears swollen. In the early stage of estrus, the female cat's vulva separates and the vulva swells; in the middle and early stage, the outer labia are obviously swollen into two large flaps, accompanied by a small amount of white mucus; in the middle and late stages, the outer labia are strongly swollen and everted, showing obvious four flaps, and the mucus becomes more; in the later stage, The swelling subsided, shrunk and dried, and the pubic hair gradually took on the shape of a brush.