Missed IUD (IUCD) is recognized by
**Core Concept**
Missed intrauterine device (IUD) or IUCD refers to a situation where an IUD, a type of contraceptive device, has been placed in the uterus but its presence is not confirmed through a post-insertion verification. This can occur due to various reasons such as faulty insertion technique or failure to perform a follow-up ultrasound.
**Why the Correct Answer is Right**
The correct answer is related to the clinical method used to verify the presence and correct positioning of the IUD. The most commonly used method is a **bimanual examination**. During this examination, the healthcare provider inserts a finger into the vagina to feel the IUD strings and the uterus, while the other hand is inserted into the vagina to feel the cervix and the uterus. This method is essential to confirm the presence of the IUD and to ensure that it is properly seated in the uterine cavity.
**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because **ultrasound** is not the primary method used for verifying the presence of an IUD. While ultrasound can be used to visualize the IUD, it is not the standard clinical method for confirming its presence.
**Option B:** This option is incorrect because **hysteroscopy** is a procedure that involves inserting a scope into the uterus to visualize its interior. While hysteroscopy can be used to confirm the presence of an IUD, it is not a routine clinical method for verifying IUD placement.
**Option C:** This option is incorrect because **IUD migration** refers to the movement of the IUD from its original position in the uterus. While IUD migration can occur, it is not related to the method used to verify the presence of the IUD.
**Clinical Pearl / High-Yield Fact**
It is essential to perform a bimanual examination after IUD insertion to confirm its presence and correct positioning. This examination helps to rule out potential complications such as IUD migration or perforation.
**Correct Answer: A. Bimanual examination**