“…Interindividual variability is a key fea ture of human pain at all levels, with labor pain being no exception [96,97]. Influences of nurture include psychological and personality factors, such as previous pain experience, emotionality, cognition, somatization, catastrophizing, acute and chronic stressful life events, fatigue, anxiety, fear and anticipation, and socioeconomic factors, such as social support, incentives, education and quality of life.…”