Intrauterine devices (IUDs) are one of the most effective forms of long-acting reversible contraception. They are small, T-shaped devices inserted into the uterus to prevent pregnancy. While IUDs are generally safe and reliable, it’s important to ensure they’re correctly positioned after insertion. This is where ultrasound plays a crucial role.

Why IUD Position Matters

For an IUD to work effectively, it needs to sit properly inside the uterine cavity. If it’s displaced, embedded in the uterine wall, or has perforated through, it can cause:

• Reduced contraceptive effectiveness.
  
  

• Pain or discomfort.
  
  

• Increased risk of bleeding or infection.

In some cases, patients may not experience any symptoms at all, making imaging essential to confirm correct placement.

How Ultrasound Detects an IUD

Transvaginal ultrasound (TVUS) is the gold standard for assessing IUDs. It provides a clear, close-up view of the uterus and allows sonographers and doctors to:

• Confirm whether the IUD is in the correct position.
  
  

• Identify if it has rotated, shifted or expelled.
  
  

• Check for complications such as embedment or perforation.
  
  

A correctly positioned IUD should appear within the uterine cavity, with the horizontal arms extended at the top and the stem visible down the centre.

When Should an Ultrasound Be Performed?

Your doctor may recommend an ultrasound in several situations:

• Routine check – some providers suggest a scan shortly after insertion to confirm placement.
  
  

• Lost or missing threads – if you or your doctor cannot feel the strings, ultrasound can locate the device.
  
  

• Pain, bleeding or discomfort – to rule out malposition or perforation.
  
  

• Follow-up – in cases where there is concern about migration or complications.
  
  

Patient Experience During the Scan

A transvaginal ultrasound is a safe, minimally invasive procedure. The probe is gently inserted into the vagina, usually causing only mild discomfort. The scan takes just a few minutes and provides invaluable reassurance.

Why Ultrasound is Essential in IUD Care

Ultrasound not only confirms correct IUD placement but also gives patients peace of mind. If a problem is detected, early management prevents complications and ensures ongoing contraceptive effectiveness.

At Ultrasound Insight, our team works closely with GPs and gynaecologists to provide clear answers when there are concerns about IUDs. Our focus is always on patient comfort, privacy and accuracy.

Key takeaway: If you have an IUD and experience unusual symptoms, or if your doctor cannot locate the strings, ultrasound is the safest and most effective way to check placement.