One of the few sources of employment for inexperienced commercially qualified pilots in the current recession is a certain low cost operator. They have an equal opportunities recuitment policy. Yet you'll see very few female pilots on their flightdecks. Read into that what you will.
I read into that that piloting appeals more to males than females and therefore a far greater proportion of men than women apply to that locost airline. If 99% of those who apply are male then an equal opportunities recruiting policy will result in 99% of pilots in that airline being male. What was the proportion of M to F where you did your flying training, where presumably anyone with the intent and the money could train regardless of sex? I suspect it wasn't 50% M and 50% F. The small number of women in aviation is not an indication of any barrier to women entering the industry.