I think I am just unlucky, cause the most pullets I ever had was 3 out of 13! Usually I just get one or two. I have only hatched like 5 times though. I wonder if the males somehow do better in my cheap incubator.
Someone posted that cooler or warmer incubator temps can cause more of one sex to hatch more than the other but I can't remember if its cooler or warmer that affects the male hatch rate. Maybe someone can chime in?