Nay, transition is a stage in labour that affects all women differently. It's widely considered the hardest part of labour - where perfectly normal women lose their minds for a while LOL. I believe it's when the cervix dilates that last 1cm and is very painful. I know of women who have screamed and sworn even though normally they would blush at such words and other women who retreat into themselves and go very quiet during this stage, so obviously it's different for everybody.