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: Gynaecology & Obstetrics
Which is most likely complication of IUD: 
Select and explain. 
A. Hypofibrinogenemia, B. Sterility, C. Cervical tear, D. None of the above
A: Hypofibrinogenemia
Answer: A: Hypofibrinogenemia 
Explanation: Complications of IUD

Psychological upset.
Uterine Infections.
Blood coagulation disorder: If the fetus is retained for more than 4 weeks (as occurs in 10–20%) there is a possibility that thromboplastin from the dead fetus enters maternal circulation and leads to disseminated intravascular coagulopathy (DIC).
During labor: Uterine inertia, retained placenta and PPH. Hypofibrinogenimia occurs due to gradual absorption of thromboplastin, liberated from the dead placenta and decidua, into the maternal circulation.