This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Choriocarcinoma, Subject name: Gynaecology & Obstetrics
[{'content': 'Which of the following is bad prognostic factor for choriocarcinoma? \nSelect and explain. \nA. Full term pregnancy, B. Short duration, C. Abortion, D. Low beta HCG', 'role': 'user'}, {'content': "Answer: A \nExplanation: ANSWER: (A) Full term pregnancyREF: COGDT 10th ed p. 892, Novak's 14th ed p. 1593PROGNOSTIC FACTORS OF CHORIOCARCINOMAGood prognostic factorsBad prognostic factorsShort duration < 4 monthsSerum beta HCG < 40,000 m IU/ mlNo metastasis to brain or liverNo significant prior to chemotherapyLong duration > 4 monthsSerum beta HCG > 40,000 m IU/ mlMetastasis to liver or liverUnsuccessful prior chemotherapyAfter full term pregnancy", 'role': 'assistant'}]