one of my friends had hyperthyroidism during pregnancy and was followed by both her gynae and an endocrinologist… from what I understand, the coordination between the gynae and endocrinologist is quite important, so I would look for a doctor who is comfortable managing higher-risk pregnancies and working closely with an endocrine team.
If you’re considering public hospitals, maybe also look into NUH, KKH or SGH as they have multidisciplinary teams. Hopefully some mums with personal experience can recommend specific doctors. ❤️
Congratulations on your pregnancy and wishing you a smooth journey ahead