Please choose the correct ending to complete the given sentence: Pets and Animals: [header] How to tell if a cat is pregnant [title] Determine if your cat is fertile. [step] If your cat is fertile and has recently been in heat, it's possible that she may be pregnant. [substeps] Female domestic cats become sexually active as the days get longer and the weather gets warmer, typically between spring and fall.

Ending1: In addition to their fertile hours, kittens also develop a tail that rolls back or side quickly in a heated environments. There are two main reasons for the symptoms of a cat's pregnancy. Ending2: If a cat not breeding is active, female cats can be pregnant. But at times when testosterone levels improve, they are more likely to become pregnant. Ending3: 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. Ending4: This can lead to changes in the daily functioning of the female cat's body, including her ability to have sex anywhere she wants. This is a sign that your cat is pregnant.

Answer format: ending1/ending2/ending3/ending4