I think Ob/Gyn gets an unfair amount of negative press on SDN. It has a lot of positives too. It is one of the few specialties where your time can be split evenly between the OR and clinic. If you're into procedures (the majority of medical students usually are), you will find no shortage of hands-on activities in ob/gyn. Most of your patients are young and relatively healthy. And childbirth, though admittedly very tense and nerve-wracking, will usually be a celebratory event shared with a family when there are no complications. But like any surgery, when things start to go bad... they get bad in a hurry.
With the 80 hour work-week in effect, I think residency life for all surgical specialties (including ob/gyn and neurosurg) has significantly improved.
Wow. So refreshing to actually read something
positive on SDN, instead of the usual glass-is-half-empty crap I'm always reading.
To the OP - congrats on setting your goals high! Like PP have said, there is a good chance that you will change your mind with regards to a specialty once (and if) you go to medicial school. That being said, I went into medical school with a suspicion that I would like Ob/Gyn (along with peds and gen surg) and low and behold here I am getting ready to start my intern year of Ob/Gyn residency.
Like PP have said, all med students have the same didactics in the first two years. Really the only year you have electives is fourth year (sometimes third year) when you are given the flexibility to do clinical rotations in fields that interest you (in addition to the required rotations). For example, this year I did an away rotation for one month in Maternal Fetal Medicine, a community rotation for one month in Reproductive Endocrinology and Infertility, and a one month rotation in L&D.
If you are looking for some reading, I'd recommend picking up some recent issues of the Green Journal (issued by ACOG, the American College of Obstetricians and Gynecologists):
http://journals.lww.com/greenjournal/pages/default.aspx
You should be able to find the journal at a local library. You could also try a textbook like Williams but I think it's out of the realm of your understanding right now and honestly probably too technical for your purposes.
This little book is great, too:
http://www.amazon.com/Obstetrics-Gynecology-Infertility-Handbook-Clinicians-Resident/dp/0964546760
Let me know if you have any other questions. Ob/Gyn is an awesome field in and of itself, with tons of potential for specialization if desired - MFM, REI, Gyn/Onc, Urogyn, Peds/Adolescent Gyn, Reconstructive Surg, etc. Best of luck to you!