Shouldn’t there be 12 children in Genesis 32:22?

Question:

Good morning,

I am working on my Bible class lesson for my Bible class tonight. While reviewing Jacob's children up to this point in Genesis, he should have 12 children: 11 sons and 1 daughter. However, Genesis 32:22 says that Jacob sent his two wives, two maids, and 11 children across the Jabbok. I am figuring that Dinah isn't included in the number of children used here since she is a female, but I was wondering if there is any foundation in that conclusion.

I have looked for information on this and I am unable to find it. Any help would be greatly appreciated!

Thank you.