Mine is a bit different because my involvement was due to my medical condition not my baby's, but my answers might help some. This was for my 1st pregnancy.

Did you see them for your whole pregnancy? Or just once? How often? I saw them throughout the pregnancy, i had appt with the high risk Ob each normally scheduled appt and saw a specialist who monitored my health monthly, and i think it increased at the end.

Why did you see them?
i have a rare neuro condition, and there is not a lot of info about pregnancy with this condition.

Did you have a natural birth?
i had a vaginal birth in hospital

Did you return to your previous "model of care" or just see OBs?
no, i stayed with them the whole pregnancy. i didn't have any issues that they could help me with, i think there was just interest in my condition.

ask as many questions as you want. this is still your body, baby, pregnancy and birth.