1st - you need to check with your doctor, as i want to 開刀 too but my doctor said that my bb is still too small and he is not recommended. Since 開刀 needs to arrange around 2 weeks before the bb due date.
If your doctor said ok, than you can check with the "see fu" who can help you 擇日. If you dont have one, pls pm me and i will tell you my "see fu" detail. He is very very good.