DS & DD1 weren't full blown labour when I headed in. DS was stalled labour after waters breaking, and DD was preterm so I headed in when it was still just starting. So they were just squirmy kind of contractions and just wanting to get there and out of the car as soon as possible. DD2 tho, thankfully was a homebirth (with my midwife rushing to me instead of me rushing to hospital LOL) cos she came so quickly, and there was no sitting for me!! There would have been NO possible way I could have sat in the car. I couldn't sit on the fitball, there was just so much pressure down below. I would have either been dangerously up on all fours somehow on the seat, or on the side of the road refusing to be in the car.

I hope you have a comfortable ride when the time comes. If the back seat is an option, that's probably a good idea.