I wonder if you have yet to do an O&G attachment if you need to ask this question. Certainly, in the UK, there is an increasing tendency to focus on one area of the specialty, which can be gynaecological oncology (probably the most "surgical" of O&G subspecialties), though there is still a fair amount of surgery in other areas, such as urogynaecology, and increasingly minimal access surgery for a range of problems, from reproductive problems including endometriosis and other pathology, to major benign gynaecological surgery such as hysterectomy. The surgery in obstetrics tends to be confined to Caesareans, of varying degrees of difficulty, however. You would currently need to train in all aspects of obstetrics and gynaecology, including non-surgical areas, before specializing, and unless you are one of the small number of people able to enter sub-specialist training and apply for purely surgical posts, would be likely to be required to participate in the obstetric on-call rota once your training is completed if you work in a district general hospital, though this is increasingly less likely to be so in larger hospitals. Not so long ago, all consultants in O&G would have at least one operating list each week; there are now "office gynaecology" posts where this does not apply, but the specialty does still have a strong surgical leaning.