Depending on the breed, living conditions and purely individual factors first estrus your cat can come from 5 months (in rare cases this happens before).
Some especially large, as well as long-haired breeds mature later. They first estrus can be expected from 9-18 months, or even later. As a rule, the average body weight of a cat in this period was 80% by weight of an adult animal. Puberty cats also depends on the season of birth. The cat, who was born in August can reach sexual maturity (ie, it comes first estrus) at the age of about eight months, while another, who was born in March, may mature in about a year or later.
Later, after puberty, female cats can produce up to 5 to 7 years of age (before, on account of age-related changes, it will decrease the amount of litters and kittens).
No matter what period your cat has not came first heat - this is not a reason to take her to the cat. Sexual and physical maturation - this is not the same thing. Cover cat preferably not until the second or third estrus, better after one year of age cats, and, ideally, after 14-16 months. By this time the animal is sufficiently formed, stronger, and you have time to do it with all the necessary vaccinations. Vaccinate your cat for two weeks before the coating is not recommended. It is also not recommended for cat cover in the first estrus, even if it came in fairly late age (as a rule, such coverage ends unfavorably).
Some cats (especially oriental breeds) may show very early signs of puberty. And since even quite young children to give pronounced regular estrus. If this account had existed a fairly rigid view - "mated only after 14-15 months," but now, after several cases of pronounced anomalies due to failure to cover intensive and regular current cats (such as attrition, violation of the cycle techek and, at the stage - the development of polycystic, which often leads to the sterilization of cats), veterinary surgeons are advised to cover the cat is not pronounced after third estrus, closing his eyes for age, season and adverse employment cat owner. Otherwise, in the future, you can get some absolutely unneeded problems.