recommendation on brands of prenatal vitamins and folic acid?

You can go to a GP to get prenatal vitamins and folic acid such as polyclinic. However if you have a preferred gynae which you want as a private patient, you can check their information to book an appointment with the gynae directly. Alternatively, you can get referral from the polyclinic to be under a subsidised scheme.

Go gynae directly, no need GP. If you want to go for the subsidised route, go polyclinic and get referral. Blackmores

You can try 21st century prenatal/pregnancy. Can be found in shopee. Works well for me. Its vegan too.