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
All of the following are indications for Anti D prophylaxis, EXCEPT: 
Select and explain. 
A. Medical aboion for 63 days pregnancy, B. Amniocentesis at 16 weeks, C. Intrauterine transfusion at 28 weeks, D. Manual removal of Placenta
C: Intrauterine transfusion at 28 weeks
Answer: C: Intrauterine transfusion at 28 weeks 
Explanation: Anti D prophylaxis is not given after intrauterine transfusion. Intrauterine transfusion is done to prevent the fetus from dying. If the hydropic fetus is too immature for early delivery, intrauterine transfusion is done. Transfusion is done through intraperitoneal and intravascular routes. This is performed using O-negative, cytomegalovirus negative, washed irradiated packed red cell. The volume to be transfused is roughly calculated by the formula: (weeks of gestation-20) multiplied by 10. Transfusion is repeated whenever fetal hemoglobin levels falls below 10gm/dl. Ref: Manual of Neonatal Care By John P. Clohey, 6th Edition, Pages 209-210 ; Textbook of Obstetrics By D.C.Dutta, 6th Edition, Page 334 ; Obstetrics and Gynaecology By Sarabatnam Arulkumaran, Page 68 ; COBGDT, 9th Edition, Page 299