Most male b&w EE's get some red patches on their wings. They also have RED 3 row combs at a pretty young age. If your b&w EE is older and doesn't have either of those, she's probably a girl. I have 2 b&w EE pullets.
I also had a cockerel, but he got those red patches pretty early, by 6-8 weeks for sure! Also the coloring on girls is very even, lacing like, while on boys, it's patchy and messy. hth!
