Which is most likely complication of IUD:
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.
Hypofibrinogenemia
Sterility
Cervical tear
None of the above