Kea,
Besides the supplement thingy, u may want to see which doc are more caring, patient, approachable, detail and reassuring? Is he/she capable in taking good care of u for 9 months til delivery? Is he/she pro natural delivery or c-section? How about his/her stitching skill? And most important thing is, does he/she calm and know what to do if u have any complication (touch wood, just in care)? Agree with others, looking for another gynae if needed, coz u need gynae that u really comfy with lo.