Poisitions on birthing ball to help rock baby out!?

[Sketchi]

Just wondering what the best positions to try, or best technique is to try and rock baby out!

Also when having contractions, I can't remember from last time what the best rocking positions are on the ball to make them stronger.

Advice appreciated.

you can sit on it, feet flat on the floor. Or you can lean against it.

I personally hated the birthing ball when I was in labour