at what age do cats go into heat

Cats typically go into heat for the first time between 4 and 12 months of age, with most starting around 5 to 9 months. Some cats can cycle as early as 3 to 4 months old, while others may not have their first heat until around 18 months. The exact timing depends on factors like breed, weight, environmental conditions, and even the time of year. Smaller breeds like Siamese tend to mature earlier, sometimes as early as 4 months, while larger breeds might take longer. Indoor cats may cycle year-round due to regulated lighting and temperature. This heat cycle is known as the estrus cycle, during which female cats exhibit signs like vocalization, affectionate behaviors, and a readiness to mate.