This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Diagnosis in obstetrics, Subject name: Gynaecology & Obstetrics
[{'content': 'An HIV positive, 36 years old female on A councils. Which of the following 1st trimester markers of Down Syndrome would be affected by? \nSelect and explain. \nA. B-hcg, B. PAPP-A, C. NT, D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Triple test It is a combined biochemical test which includes MSAFP,hCG,UE3 Used in detection of down&;s syndrome In an affected pregnancy level of MSAFP AND UE3 tend to be low and hCG is high performed at 15-18weeks D.C.DUTTA&;S TEXTBOOK OF OBSTETRICS,Pg no:106,7th edition', 'role': 'assistant'}]