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: Social & Preventive Medicine
Most common side effect of IUDs 
Select and explain. 
A. Pain abdomen, B. Increased vaginal bleed, C. Abortion, D. Pelvic Infleammatiom
B: Increased vaginal bleed
Answer: B: Increased vaginal bleed 
Explanation: Most common side effect : Increased vaginal bleed.
2nd most common side effect : Pain.