Lippes loop contraceptive device

Last revised by Ashesh Ishwarlal Ranchod on 11 Jun 2023

Lippes loops are a type of an intrauterine device (IUD). It is a flexible polyethylene plastic trapezoidal loop meant for long-term use.

Radiographic features

Plain radiograph

Radiopaque serpiginous material visualized within the mid-pelvis in an anterior posterior pelvic x-ray is the hallmark feature of a Lippes loop.


Axial ultrasound slices will demonstrate hyperechoic, thick, linear tubular structure with classical rosette-beaded appearance mostly with sonolucent centers and rounded outer rings echo-densities.


Appears as a double S-shaped radiodense material within the mid pelvis.

History and etymology

Lippes loops were first distributed in 1962, however, its usage dropped in the early 1980s as copper IUDs became more popular and manufacture ceased 3. They were developed by Jack Lippes (1924-2022), an American obstetrician-gynecologist 4,5.

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