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
Which among the following is the most common side effect of IUD inseion? 
Select and explain. 
A. Bleeding, B. Uterine perforation, C. Pelvic infection, D. Ectopic pregnancy
A: Bleeding
Answer: A: Bleeding 
Explanation: The most common side effects repoed by IUD users are cramping and bleeding. These symptoms can be minimized with the use of a nonsteroidal anti-inflammatory drug. However, if symptoms are persistent or severe the patient should be evaluated for infection or perforation. Other side effects are dysmenorrhea, expulsion, or uterine perforation. Ref: Brunsell S.C. (2011). Chapter 17. Contraception. In J.E. South-Paul, S.C. Matheny, E.L. Lewis (Eds), CURRENT Diagnosis & Treatment in Family Medicine, 3e.