I recommend Lo & Obstetrics and Gynecology near Jonggak Station in Jongno-gu.

If you go to Jonggak Station, there is Lo Obstetrics and Gynecology. Right next to it on the same floor is Lo Internal Medicine. I went there because of a bladder infection and had to leave work briefly. Since it's in the middle of Jongno, there were really many patients, so I had to wait for a while. It seemed like there were two doctors, but I didn't specifically request a particular doctor and just went in for treatment. The doctor was a young female doctor, very kind and explained everything carefully. I usually don't like going to obstetrics and gynecology clinics, but thanks to the comfortable and friendly doctor, I was able to receive treatment with peace of mind. I'll share the location.