At 9 weeks scan for pregnancy, does the doctor typically do a vaginal ultrasound?

Yes: Its better visualized transvaginally. Typically after 12-13 weeks you can see a little bit better transabdominally. Transvaginall probe provides unparalleled details and high quality images that are priceless in making earlier diagnosys and establishing an acurate due date.

Sometimes: It depends on the doctor, as well as the possibility the woman needs or doesn't need the scan done at that time (depending on her history).