I sound like a whale or cow, the primal bellowing Dansta mentioned. With DS2, I spent a lit of time in the birth pool, banging the side of the bath & lowing I deliberately keep it low, as a high tone can make me feel panicky. I breathe in slowly and then vocalise a long aaaahhh as I breathe out.

It wasnt so obvious with DS1, as I was using hypnobabies. The midwives knew I was at pushing stage when I started roaring. And it was a full throated, reaching deep into the earth kind of roar. Very empowering