I recommend Kim Yun-suk Obstetrics and Gynecology in Jamsil.

This is the hospital I always went to when I was suffering from gynecological diseases. The female doctor was so kind and attentive that I went there for a year without any worries and I am now better.

Don't stay away from an obstetrician/gynecologist. If you notice something unusual, go there right away to get a consultation and treatment.