We know that during delivery, there are four factors that affect delivery: labor force, birth canal, fetus and mother\’s psychological condition. Problems with any of these four factors may lead to dystocia. Factor 1: Birth Canal What is a \”soft birth canal\”? The soft birth canal includes the uterus, cervix, vagina and vulva. Common anomalies of the soft birth canal include uterine malformations (such as double uterus, malposition of the fetus, or single uterus blocking the birth canal), uterine fibroids,