This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Abnormal labor, Subject name: Gynaecology & Obstetrics
[{'content': 'AG2P1 to female has a history of previous preterm bih at 32 weeks. The percentage chances of preterm bih in this pregnancy are: \nSelect and explain. \nA. 5%, B. 10%, C. 15%, D. 25%', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Preterm labour is defined as spontaneous expulsion of the products of conception after bility and before 37 completed weeks.Prior preterm bih is a very good predictor of subsequent preterm labour.There is three fold increase in risk for these women (refer pgno:193 sheila textbook of obstetrics 2 nd edition)', 'role': 'assistant'}]