how to specify sons instead of just children
I I understand it correctly: If I say tengo tres hijos - that is I have 3 children
If I say tengo tres hijas - that is: I have 3 daughters (specifying daughters)
but how would I say I have 3 sons. - (to specify sons)
3 Answers
Another option would be "tengo tres hijos varones" but I do not know what is the most natural.

Tengo tres hijos, no hijas.
So, if I am reading something, that just says hijos, would I normally take that to mean children instead of sons?