How many women vs men start up in other business fields, such as fashion designing? That gives you an idea about whether or not the problem is with access to finance, or whether there is just a lack of suitably qualified women.
I've only ever seen one pair of women try to set up a technology business. They thought that a 10 week course in Frontpage Express at their local community college would equip them with the skills required to set up an internet business (back in 2000 when everyone was trying to get in on the dot.com boom). They weren't successful.
Having said that, around the same time, jellyworks.com plc (run by a couple of men) raised a huge amount of money on the stock market when they didn't even have a website and nothing more than some back-of-an-envelope plans to create one that didn't come to anything.
[There is a website at that domain today, but the domain is now in new ownership, and has nothing at all to do with Ed Gunian or Jonathan Rowland who floated the original jellyworks.com company.]