Siamese cats reach sexual maturity early, with females experiencing their first estrus cycle at around 5 months old. They typically experience estrus every two weeks, continuing uninterrupted through autumn and winter. Siamese cats are more prolific than other domestic cats. They are highly fertile, producing up to two litters per year, with 5 to 6 kittens per litter. 
Generally speaking, mixed-breed cats live longer than purebred cats, with the exception of Siamese and Chinchilla cats (Siamese cats are purebred but live longer, while Chinchilla cats are mixed-breed but live shorter). Spayed/neutered cats tend to live longer, obese cats live shorter, and cats fed a balanced diet of cat food or canned food live longer than cats fed leftovers.
A well-fed Siamese cat can live up to 12-20 years.
The editor would like to remind everyone that clinical research shows that regardless of the rate of aging, cats over 6 years old begin to experience significant changes in organ function, and many diseases common in senior cats also occur after the age of 6. Just as humans enter their twilight years, pets also transform from playful and adorable little creatures into slow-moving elderly individuals. Like humans, senior pets also enjoy a peaceful life, and should not be forced to do things they don't like. We should approach their behavior with compassion.
Siamese cats have significant defects in their reproductive organs compared to other cats, and spaying or neutering at the appropriate age can prevent most reproductive organ diseases.
