IU is the abbreviation for which term?

• A. Intramuscular
• B. Intramural
• C. Intrauterine
• D. Intravenous

Answer: (C)

The main idea here is that the prefix intra- means within or inside. When you attach it to uterus, you get intrauterine, meaning inside the uterus. That’s why IU stands for intrauterine in this context. This term is common in obstetrics and gynecology to describe something located within the uterus, such as an intrauterine pregnancy or the concept behind an intrauterine device (IUD). The other options refer to different locations: intramuscular would be inside muscle, intravenous inside a vein, and intramural inside the wall of an organ. Those contexts use different abbreviations and point to different structures, so they don’t match IU in this usage.