Final answer:
Dystocia is defined as long, difficult, or abnormal labor. It can be caused by various factors affecting labor and may require medical intervention.
Step-by-step explanation:
Physiology of Labor
Long, difficult, or abnormal labor is called dystocia. Dystocia can be caused by various conditions associated with the five factors affecting labor, which are the power, passage, passenger, position, and psychological factors. These factors can include problems with the strength and coordination of the uterine contractions, abnormalities in the birth canal, abnormalities of the fetus, malposition of the fetus, and emotional factors. Dystocia may require medical intervention to ensure a safe delivery.