hi Mouse,
I am expat too, my obgyn was Dr. Yuen Tak Ho Paul , his clinic in causeway bay at mc donalds building.
I used to asked him a lot of question since it was my first time pregnancy and he was always patience to answer to my worries. the cilick will charge you for HKD 1500 for fist time visit then HKD 800 afterwards.
I am not referring him to you, since so many good obgyn in HK