Suggest you google for review or you can ask your friend(s) who gave birth recently for their recommendation. I got mine from a friend who gave birth few months ago and am seeing that same gynae!
u cn ask on fb grp.. they will recommend u the gynae they personally feel is Good
Try this link https://www.kkh.com.sg/patient-care/Pages/FindDoctor.aspx#abdomen
Check with the admin staff or Google for reviews