How to sex the kittens?

How can I see if the kittens are - boy or a girl? I try to look. If I see 6 nipples, I Believe that it's a female. If I cannot find any behind the fur, I Believe that it is a male. But it's difficult. I want to give them all a name. Two of the dark -Brown or black have just a Twin look. They look the same both, at least one of them (he, ha). I know that the vet, she will tell me what is right.

If you're having a hard time sexing the kittens to place them in their future homes, you could take a picture of their back ends and we can help you with that.

Usually a male has a further distance between the anus and the penis, which looks like a dot. The female has a shorter distance between the anus and the vulva, which will appear as a vertical "slit".