I completely get how tricky it is to find a specialist at SGH; I went through a similar search myself not long ago. It really helped to find someone who took the time to explain things simply. I ended up seeing Dr Chen from Healthcare for Women, and she was honestly great to deal with if you're still looking for a reliable gynae in Singapore.
Dr Devendra.... best ever! Super friendly, realistic, accurate and keeps calm. Had all 3 pregnancies checked, babies delivered by him. Only downside is beds are really tight cuz they have limited wards, the rest are for normal patients in sgh. But otherwise is ok 😍