It depends on which gynae you prefer or are currently attached to. Then, followed by if they are available during your EDD. While the price can be questionable and ex, but it also boils down to whether you prefer that gynae or not. If they are not available during your EDD then you have to look for other available gynae. For gov hospital, they will have a fix package for Antenatal MP which you can ask for price however, for gynae may/may not be price included.
guess u can ask around ur friends for gynae recommendations and start from there. :) if you have chosen the private route, I guess the price is around the same. :) u can cross reference with the few bigger names.