There's an increasing number of females in this hobby and on IceInSpace, but they are still far outweighed by the number of males.
I guess the reverse question could be asked on the sewing forums?
Yes stereotypical I know, but that's just how it pans out at the moment.
In my Uni course of 73 students (an IT course), only 3 were females. There's just not the same level of interest in some hobbies/technologies at the moment.