Cats typically go into heat for the first time between 4 and 9 months of age, with most commonly around 5 to 6 months. Some kittens can start cycling as early as 3 to 4 months, especially certain breeds like Siamese, while others may not experience their first heat until around 10 to 18 months. The timing depends on factors like breed, weight, and environmental conditions such as temperature and daylight. Once they reach puberty and go into heat, unspayed female cats may continue to have multiple heat cycles throughout their breeding season or year-round if kept indoors with regulated light and temperature.
