Recognizing Signs of Fertility
Before your cat is pregnancy, it has time for them to fertilize and mate with male cats. Therefore, you need to determine whether your cat is fertile. If your cat is fertile and has recently been in heat, it’s possible that she may be pregnant.
Female domestic cats become sexually active as the days get longer and the weather gets warmer, typically between spring and fall. A female cat may start her estrus cycle (go into heat) once the weather becomes warmer and she has reached about 80% of her adult weight. This means a cat may go into heat as early as four months of age in unusual cases.
When a cat goes into heat, she displays clear behavioral changes meant to attract a mate that will last about four to six days. A cat about to go into heat will initially display signs of restlessness, become more affectionate, begin making low calls, and have increased appetite.
When she enters into heat, she will begin “calling”--meowing or mewling frequently and insistently--and may lose her appetite. A cat in heat will become much more affectionate towards people, will roll around, and will prop her hind quarters up in the air while treading her back paws and holding her tail to the side. You may concern the information of cat’s tail language. Just read and detect your cute cat’s sign.
After being in heat, a female cat will enter into a “quiet phase” lasting about 8-10 days, during which her behavior will calm down. Following the quiet phase, however, your cat will go into heat again and continue to go into heat through the period between April and September. To prevent your cat from going into heat and/or inadvertently getting pregnant, have her spayed as soon as it’s safe to do so.
However, that sign may be unclear due to cat’s illness or emotion. The best way to find out is to make an appointment with your vet. He can confirm that kittens are on the way, and get an idea of how many, by feeling a cat's belly early on, doing an ultrasound in mid-pregnancy, or doing an X-ray in late pregnancy.