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
Fetal anemia is detected on Doppler of: 
Select and explain. 
A. Uterine artery, B. Umbilical artery, C. Middle cerebral artery, D. Any of the above
C: Middle cerebral artery
Answer: C: Middle cerebral artery 
Explanation: Ans. is c, i.e. Middle cerebral arteryRef. Williams 23/e, p 362, 363As discussed in the text:Doppler of Middle cerebral artery is used to detect.(i). Fetal anemia as in Rh isoimmunization, vasa previa and TTTS(ii). IUGR