This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Gynaecology & Obstetrics
[{'content': 'Probability to achieve a live birth within a single cycle is \nSelect and explain. \nA. Fertility, B. Fecundity, C. Fecundability, D. Sterility', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Probability to achieve a live birth within a single cycle is called Fecundity.', 'role': 'assistant'}]