Precision Intrauterine Contraception

Uterine cavities differ in size and shape like our feet. One size IUDs will therefore not fit in all uterine cavities. IUDs only have the ability to reduce unintended pregnancy if women continue to use them. Tolerability of the device has shown to be paramount to achieving this aim. Long-term use of the same device is promoted if health care providers give attention to the size and shape of the uterine cavity prior to insertion of a ‘standard size IUD’. The 3D ultrasound pictures below from nulliparous users of the frameless IUD show the great disparity of IUD cavity size and shape. However, the frameless IUD fits in all these cavities. These women will likely be free of any complaints and continue to use the device for the full lifespan of the IUD.

“Maximum comfort during prolonged IUD use and a high continuation rate is achieved by using an IUD of which the greatest transverse dimension of the IUD is equal or slightly in excess of the fundal transverse dimension” (H. Hasson). These geometric relationships pro­mote IUD retention and stability while minimizing endome­trial/myometrial trauma.

Size and shape are important considerations doctors should make prior to selecting an IUD.

Courtesy of Dr Sohela Jandi and Dr Kilian Nolte

The aim of our research is to maximize continuation of use of the intrauterine device (IUD) by minimizing side effects in order to reduce unintended pregnancies. Many IUD designs and shapes are a direct result of clinicians efforts to improve the performance of IUDs and reduce the overall level of their side effects. The IUD-cavity relationship and the tolerability of the device is paramount to achieving this aim.

The Ideal Cycle
The Ideal Cycle

Research

Frameless IUD

Frameless IUD

Frameless copper IUDs are designed to optimize intrauterine contraception The uterine cavity width is the most important parameter related to IUD performance and the occurrence of side-effects. The average width in yo...

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Emergency IUD contraception

Emergency IUD contraception

Practical advice for emergency IUD contraception in young women

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