I believe I am the actually first female to reply to this...
I'm a few months away from beginning residency, and just have a few items to respond to.
I agree that men and women are not yet on equal ground regarding application to residency programs. However, I think that the inequalities are often misinterpreted. There is not an extensive history of women going into orthopaedics. The number is certainly on the rise, but it is a gradual incline. There is a wide range of responses to the increase in women in orthopaedics.
A few programs are slightly terrified at how having women in their program would affect the way their program operates--these are programs to avoid when applying. Residency is busy and stressful enough, the last thing you need is the additional concern that your gender is looked upon unfavorably by your fellow residents and your attendings.
There are other programs that are trying to actively recruit women. Your own instinct will have to be your guide to deciding whether these programs are trying to meet some sort of quota or whether they are just trying to be sincere that they value female orthopaedic residents. Its usually a pretty easy call. Some female applicants are happy to hear that they are being recruited because of their gender, because in many ways, it gives them an edge over other applicants. However, be cautious of these programs, because many of them may turn out to be the programs that have been referenced in the previous posts as having quotas for the number of women they want in their program.
Finally, there are programs, and plenty of them, that choose their residents based on their qualifications and personal characteristics, irregardless of gender. In interviewing this past winter, I valued the interviews where the fact that I am female never came up with the staff or with the residents. These were the programs that landed at the top of my list, and fortunately, I have matched at one of them.
As far as the other concerns mentioned, I cannot see that you have many limitations in pursuing orthopaedics. Your board scores and grades may keep you from getting some interviews, but if you apply wisely, work hard on your electives next year, and get excellent letters I think you will be all right. Your gender and your size should be of very little concern, not only in regard to applying for residency but also in regard to being an orthopaedic surgeon. I wish you the best of luck. If you have any other questions, I would be happy to reply, however, this is the first time I have posted on this site, and I still don't understand what a PM is.