Your gender doesn't matter that much. Both men and women usually pursue most of the majors. And in physics and maths you usually substantial amounts of women.
In IT, being pretty fresh in this part of the world, men are majority but still not overwhelming.
Anecdata: from primary school to the end of my university I've only had male maths teachers for a year and a half.
I don't have an immediate source for this but I have an impression that post-Soviet societies are a lot more equal than Western ones.