I agree with Joyce, this mama may change nothing at all about the pushing part of her second birth and pushing out her baby will be MUCH faster. I always encourgae mama to wait for the uncontrollable urge, let that feeling build and build until you cannot not push and mark true pushing from that point.
Once in a while to help a baby get around the pubic bone I get the message that McRoberts would help and sure enough it helps bring that head around the bone quickly. Doesn't make sense to go on the back, but it can work.
Just had a repeat mama who pushed 4 hours as a primip and second baby was 10 minutes of true pushing. She was probably fully dilated (no ve's just going by emotional and physical markers) for an hour or more but we waited for the uncontrollable urge before marking pushing.
There is a voice inside of you
That whispers all day long,
"I feel this is right for me,
I know that this is wrong."
No teacher, preacher, parent, friend
Or wise man can decide
What's right for you--just listen to
The voice that speaks inside."
— Shel Silverstein