Dr Ang charges between S$70-S$90 per consultation (back in 2008)- not sure if its still the same.
However, once you reach 14 weeks, you can opt for the full package of S$550- which means whaterver amount which you have already paid will be deductable- eg within the 3mths, you have gone to see him 4 times @S$80/time.
Will amount to S$80x4=S$320.
Bal need to pay is only S$230.00 for all check up only (excluding hospital fee, delivery charge, etc)
However, if you do not have the S$230 bal, you may still opt to pay on each visit, till you fulfil the S$550 (just need to inform the nurse only)
If just to check if you're preggy, I dun tink he will ask if you're married or not. (not sure)
Unless you are going in for abortion procedure.