Generally speaking, cats become sexually mature around 8 months old. When a cat is in heat for the first time, its reproductive organs are not fully developed. However, after 2-3 months of sexual maturity, no matter if it is a male cat, it will become sexually mature. The testicles of the cat and the ovaries of the female cat are basically mature and can ovulate and sperm normally. However, this stage is not the best breeding stage because the cat at this time is not yet physically mature, and its bones and muscles have not yet developed. Sound, if blindly bred, problems such as degeneration, malformation, polygenetic diseases, thinness, and short lifespan of the offspring are likely to occur. Therefore, it is best to wait until the cat is mature before breeding. Generally, female cats are born after 1 year old. Male cats are born after 1 and a half years old.