This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
Uterine bleeding at 12 weeks gestation without any cervical dilation is an indication of 
Select and explain. 
A. Incomplete aboion, B. Threatened aboion, C. Missed aboion, D. Inevitable aboion
B: Threatened aboion
Answer: B: Threatened aboion 
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 aboion. A threatened aboion takes place when this uterine bleeding occurs without any cervical dilation or effacement