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
What is the indication for the usage of mifepristone? 
Select and explain. 
A. Ectopic pregnancy, B. Fibroid uterus, C. Molar pregnancy, D. Habitual aboion
B: Fibroid uterus
Answer: B: Fibroid uterus 
Explanation: Mifepristone, also known as RU486, is an antiprogestin that has been used for treatment of leiomyomas. Mifepristone diminishes leiomyoma volume by approximately half. Mifepristone, in combination with misoprostol or other prostaglandins, is available for the termination of early pregnancy. Ref: Hoffman B.L., Schorge J.O., Schaffer J.I., Halvorson L.M., Bradshaw K.D., Cunningham F.G., Calver L.E. (2012). Chapter 9. Pelvic Mass. In B.L. Hoffman, J.O. Schorge, J.I. Schaffer, L.M. Halvorson, K.D. Bradshaw, F.G. Cunningham, L.E. Calver (Eds), Williams Gynecology, 2e.