I'm not sure why this is the case but cycling and women don't seem to go hand in hand much. While yes women do ride bikes but cycling is really a male dominated sport, it's not as male dominated as it was back in the 70's and 80's when it was rare to find a woman riding a bike but it still isn't as popular with women as one would hope it would be after all these years. Women seem to run more than bike, not sure why that is. When I say bike I don't mean ride around a local park or around the neighborhood, but go on longer rides of 20 plus miles. Even when I use to live in Southern California in the 70's and 80's it was rare to find a woman riding a bike any sort of distance, they mostly did aerobics and ran...those that did anything at all! Today I live in the midwest, I would guess that here about 15% to 20% tops of the serious riders are women, back in the 70's and 80's it was maybe 1/2 of a percent at the most! I have asked women on occasion over the years why they don't like to ride bikes and almost all of them indicated that they were fearful of traffic which I found interesting, not a very scientific survey though, but there might be a trend there in their thinking?
Keep in mind my percentages are pure guess, I could be way off track, but that seems to be close to the ratio where I live, those percentages I mentioned may be a lot higher in biking mecca areas like Southern California and Denver Colorado.
Women can be extremely good riders. I was riding at my cruise speed of 19 mph when this lady, on a very expensive bike, buzzed past me at around 24 mph, and she kept that pace without much effort! I couldn't hang with her! There are no pro riders in my city so she wasn't a pro either, and I haven't seen her at any of the local race events or clubs but she was a strong rider. She had no fear of riding roads since I saw her riding on a country road. And from what I've read from a scientific research site that women have better stamina than men do! This is why Juliana Buhring, a ultra endurance rider who rode the Trans am race in 2014 took first place in the women's category BUT took 4th place OVERALL!! She did the Transcontinental race in Europe and placed 9th overall!
Women is an area where the cycling industry could do a much better job at marketing to that's for sure.
This is all my opinion of course so I hope no one kills me for what I've said, I know male vs female subjects can get quite heated and I really hope I haven't done that or offended any women.