Sexing kittens is usually done by gently lifting the tail and comparing the distance and shape of the openings
Male kittens typically have a larger gap between the anus and genital opening
Male kittens usually have a round genital opening
Female kittens typically have a smaller gap between the anus and genital opening
Female kittens usually have a vertical slit-shaped genital opening
If the kitten is very young, sexing can be difficult and may require a veterinarian or experienced breeder
Handle kittens gently and briefly, and return them to the mother promptly