Knowing how to tell the sex of kittens is a simple and important skill. Being able to determine the sex of kittens can help you to select a new pet, properly name your kitten, and ensure that you do not receive any surprising news during your kitten's first visit to the veterinarian. While it will typically be easiest to identify the sex of a kitten when you have other kittens to compare to each other, it is not difficult to determine the sex of a kitten on its own.
- Lift the kitten's tail. The first step to identifying the sex of the kitten is to hold him or her still and gently lift the kitten's tail. The opening just under the tail is the kitten's anus. The genitals are located below the anus.
- Look at the shape of the genitals. A female kitten will have genitals that look like a short vertical line while a male kitten's genitals will look round in shape. The testicles on the male kittens will typically not be visible until later in his development.
- Check the spacing. This will be easier to do with multiple kittens to compare. The female kittens' genitals will be located directly under the anus. The male kittens will have more space between the anus and the genitals.
- Consider the kitten's coloring. While this is not a foolproof method, a kitten's coloring can help to determine the sex. Most calicos, cats with a mix of white, black, and orange coloring, are female. The majority of solid-colored orange cats are male.