Doing research for good pre-natal exercise courses in HK. Found these ones:

http://www.isofit.com.hk/pre_post__natal_program.html
http://www.matilda.org/eng/healthedu/fitness.php
http://www.pure-yoga.com/en/hongkong/schedules/class_types_revamp.php
http://www.bbcare.hk/bb_course.php

Seems the Iso Fit is the best one according to many blogs and GeoBabies. But still need to find out when's the best time to start the exercises and which one best fits our schedule and location. Any recommendations?