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: Unknown
Uterine bleeding at 12 weeks gestation without any cervical dilationis an indicative of 
Select and explain. 
A. Incomplete abortion, B. Threatened abortion, C. Missed abortion, D. Inevitable abortion
B: Threatened abortion
Answer: B: Threatened abortion 
Explanation: Bleeding occurs in about 30 to 40%of human gestations before 20 weeks of pregnancy, with about half of these pregnancies ending in spontaneous abortion.
A threatened abortion takes place when this uterine bleeding occurs without any cervical dilation or effacement