This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Fetus & New Born and their Diseases, Subject name: Gynaecology & Obstetrics
[{'content': 'After an initial pregnancy resulted in a spontaneous loss in the first trimester, your patient is concerned about the possibility of this recurring. An appropriate answer would be that the chance of recurrence \nSelect and explain. \nA. Depends on the genetic makeup of the prior abortus, B. Is no different than it was prior to the miscarriage, C. Is increased to approximately 50%, D. Is increased most likely to greater than 50%', 'role': 'user'}, {'content': 'Answer: B \nExplanation: An initial spontaneous abortion, irrespective of the karyotype or sex of the child, does not change the risk of recurrence in a future pregnancy. The rate is commonly quoted as 15% of all known pregnancies.', 'role': 'assistant'}]