An intrauterine device (IUD) is placed in the endometrial cavity at the level of the ______ and ______.

• A. Superior Corpus and Fundus
• B. Inferior Cervix and Body
• C. Anterior Myometrium and Endometrium
• D. Lateral Uterine Serosa and Oviducts

Answer: (A)

Placing an IUD sits inside the endometrial cavity, ideally in the upper part of the uterus. The best position is at the fundal region and the superior portion of the corpus because that location keeps the device well within the lumen, allows the horizontal arms to rest against the fundus for stability, and reduces the chance of expulsion or perforation. If the device were lower, toward the cervix, it’s more likely to be expelled or become poorly positioned; if it were outside the endometrium or into the myometrium or beyond the uterine serosa, that would pose risks of perforation or migration. On ultrasound, you’d expect to see the IUD within the endometrial canal near the fundal area, aligning with the intended placement.