There are less women going into computer science because there are less women in computer science. It's an issue of the social norm, not math ability, biology,

There are less women going into computer science because there are less women in computer science. It's an issue of the social norm, not math ability, biology, or anything else. Most people, male or female, will pick colleges, majors, careers, etc. based on what their friends do and think. If none of your friends are going into computer science, you'll feel uncomfortable choosing it and will go into microbiology like your friends.