Women have different hobbies, or indeed careers, than men. Not much competition in the market for manicure salons, for example (I'm aware of Phorest).

The women I know tend to have different creatives hobbies than men's creative hobbies (think crocheting vs woodworking). I'm willing to be there are more woodworking CAD programs than equivalent programs for crocheting in the market.

There are fishing lure design applications. Can you think of something similar for a more feminine hobby?