Home / Cats / Veterinary Reasons that may cause sterility Your cat is sterile? First of all, check if something from the list below could have affected her: - cat lives alone and has no contact with her congener; - on the contrary, it lives with many cats in the house where there is not enough place for all of them; - the room where the cat lives is poorly illuminated; - it is surfeited (suffers obesity); she is too young... or too old; - it was given medicines to stop heat; - she is not used to traveling and was driven 200 km by car to meet a male; - she was too late taken to a partner; - she had not enough time when she was left with a male; - she is timid or aggressive by nature or a male is inexperienced; - she doesn't like a male (these often happens); - this is her first heat in this year: most part of first heats in season passes without ovulation; in spite of the fact that everything goes well, a female doesn't become pregnant. You should wait for the second heat. The age of puberty varies between breeds and also depends on the season of birth: a cat born in August reaches the age of puberty, that is, will have a heat at eight months, while another one born in March will have a first heat at one year or later. Besides such pathologic factors as viral diseases, cat sterility may be the sequent of wrong keeping. Translated by Tatiana Karpova (Moscow) (MSU, Biology faculture, Dep. zoology and ecology).