A young woman with an IUD shows signs of fever and abdominal pain. What condition might you suspect?

In the scenario presented, a young woman with an intrauterine device (IUD) experiencing fever and abdominal pain raises strong suspicion for septic abortion. This condition is associated with an infection that can occur when abortion-related tissue becomes infected, often accompanied by the presence of retained products of conception. The fever indicates a systemic response to the infection, while abdominal pain is a common symptom related to inflammation or infection in the pelvic region.

Additionally, the presence of an IUD can complicate the situation, as IUDs can sometimes lead to incomplete abortions or increase the risk of infections if pregnancy occurs despite the device. The typical presentation of septic abortion aligns with the signs of infection and the woman's medical history of having an IUD, making this the most plausible diagnosis in her case.

Other options, such as missed abortion and implantation bleeding, do not typically present with fever and significant abdominal pain as primary features. Normal menstrual symptoms would not create such a clinical picture either, especially in the context of an IUD in situ. Thus, septic abortion is the logical conclusion when considering the symptoms and clinical background provided.