This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Contraceptives, Subject name: Gynaecology & Obstetrics
A woman 30 years of age, is on warfarin for deep vein thrombosis. Which contraceptive should be advised to her? 
Select and explain. 
A. Progesterone only pills, B. Levonorgestrel, C. IUCD, D. Implanon
C: IUCD
Answer: C: IUCD 
Explanation: Hormonal contraceptives Estrogen - aerial thrombosis Progesterone - venous thrombosis Progesterone or estrogen preparations are therefore not preferred, thus excluding progesterone only pills, levonorgestrel and Implanon. Non hormonal IUCDs are thus preferred over hormonal contraceptives in patient of DVT