Picking an age range or sex of children to foster

I could have written your post last year. We were in the same boat as you. We have three boys of our own and we only foster girls. We knew that we wanted to add a girl to our mix and I did not want to "miss" a little girl because we were fostering a boy that we knew we would not one day adopt. So we stuck to our "girls only" rule. Do what is in your heart. :)