menstrual cups and IUDs - what women need to know

World Contraception Day is my daughter’s 13th birthday. As a doctor specialising in contraception, and a mother of teenage girls it feels the perfect time to reflect on the different contraceptive options available to their generation...
menstrual cups and IUDs - what women need to know
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In the UK now we have a range of progestogen-only, long-acting reversible contraception (LARC) including injectables, an implant and a variety of hormonal intrauterine devices. In the past 30 years, contraception has also increasingly been recognised and utilized for a wide range of other health benefits, for example, treatment of heavy menstrual bleeding, endometriosis, polycystic ovarian syndrome, and premenstrual syndrome often in more tailored regimens. Alongside newer methods and new ways of taking existing methods, the popularity of the much older, non-hormonal method, the copper intrauterine device (IUD) is steadily increasing. This mirrors the rising trend of menstrual cup usage particularly among younger women. In our article Menstrual cup and risk of IUD expulsion – a systematic review we examine the evidence to date and highlight an important research gap which is limiting the ability of these young women to make informed choices regarding intrauterine contraception and their menstrual management.

During a COVID lock down three years ago, I was contacted by a 4th year medical student who wanted to know whether clinicians and patients were aware of any association between menstrual cups and expulsion of IUDs and was keen to explore this topic. During my clinical training I had seen experienced clinicians advising IUD users against menstrual cups and had increasingly been asked about this in clinics. I had also started proactively asking women presenting with missing threads or expulsion of IUDs about their use of menstrual cups so had anecdotal evidence of this. However the national guidance at the time did not explicitly recommend counselling regarding this risk nor avoiding using the menstrual cup with an IUD. So together we began to have our own look at the evidence.

Since the publication of our article earlier this year, the Faculty of Sexual and Reproductive Healthcare (FSRH) has published updated guidance on Intrauterine Contraception in March 2023 stating that “Evidence suggests that there could be increased risk of expulsion associated with menstrual cup use” and we think this is important to share with patients. However the guidance also highlights the lack of evidence to inform risk of intrauterine contraception expulsion associated with use of menstrual cups. In our article we call for high-quality randomised controlled trials to assess this risk and the impact of factors such as age, menstrual cup removal technique, pelvic anatomy, IUD type, menstrual cup brand and measures such as cutting the IUD strings short or delaying menstrual cup use for a time period post-insertion.

Despite enhanced contraception choices over the last 30 years, it remains important to maintain and support the safe usage of the copper IUD as the only non-hormonal, highly effective, longest-acting, reversible method and the most commonly used reversible method worldwide. Whilst there is undoubtedly work to be done to ensure that intrauterine methods are universally accessible, the extent to which menstrual management may compromise the effectiveness of intrauterine contraception should not continue to be overlooked.

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Reproductive Medicine
Life Sciences > Health Sciences > Clinical Medicine > Reproductive Medicine
Health, Medicine and Society
Humanities and Social Sciences > Society > Sociology > Health, Medicine and Society
General Practice and Family Medicine
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