This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General obstetrics, Subject name: Gynaecology & Obstetrics
Not true about ectopic pregnancy: 
Select and explain. 
A. Previous ectopic is greatest risk, B. Pregesterone only pills doesn't increase risk, C. Increased risk with pelvic infections, D. Increased risk with IVF
B: Pregesterone only pills doesn't increase risk
Answer: B: Pregesterone only pills doesn't increase risk 
Explanation: Causes for ectopic pregnancy Pelvic inflammatory disease Congenital factors Salphingitis isthimica Previous surgery on the tube Assisted reproductive technology Intrauterine devices Cigarette smoking Previous ectopic (refer pgno:158 sheila 2 nd edition)