["to explore whether choices in birthing positions contributes to women's sense of control during birth.", "survey using a self-report questionnaire. Multiple regression analyses were used to investigate which factors associated with choices in birthing positions affected women's sense of control.", 'midwifery practices in the Netherlands.', '1030 women with a physiological pregnancy and birth from 54 midwifery practices.', 'in the total group of women (n=1030) significant predictors for sense of control were: influence on birthing positions (self or self together with others), attendance of antenatal classes, feelings towards birth in pregnancy and pain in second stage of labour. For women who preferred other than supine birthing positions (n=204) significant predictors were: influence on birthing positions (self or self together with others), feelings towards birth in pregnancy, pain in second stage of labour and having a home birth. For these women, influence on birthing positions in combination with others had a greater effect on their sense of control than having an influence on their birthing positions just by themselves.'] Does influence on birthing positions affect women 's sense of control in second stage of labour?