Menstrual cups have become a go-to choice for individuals seeking a sustainable, comfortable, and cost-effective period product. But if you have an IUD (intrauterine device) for birth control, you might have heard mixed advice about whether a cup is safe to use. Let’s clear up the confusion and get the facts from medical experts, so you can make the choice that’s informed and right for you.
What Doctors Say About the Risks
The main concern when using a menstrual cup with an IUD is the possibility of IUD displacement, which is when the IUD moves from its correct position. This can happen if suction from the cup accidentally pulls on the IUD strings during removal.
Current medical research shows:
- The overall risk of IUD expulsion is low, and most cases happen in the first few months after insertion, which can happen with or without a menstrual cup.
- A few studies suggest there may be a slightly higher risk when using a menstrual cup, but the evidence is not conclusive.
- Many gynaecologists say you can safely use a cup after your IUD has settled (usually 6–12 weeks after insertion), provided you remove it correctly.
The studies:
- A systematic review of seven studies found a possible association between menstrual cup use and increased risk of IUD expulsion or displacement. Expulsion rates reported ranged from 3.7% to 18.6%, with timing varying from under a week to over two years. Researchers emphasised that evidence is limited and high-quality trials are still needed BioMed Central, PubMed).
- A recent French case-control study of 747 individuals found that menstrual cup users faced a 2.6× higher risk of IUD displacement—even after just one use. Displacement occurred in 15% of cup users versus 5% of non-users Medscape.
Essentially, always check with your healthcare provider before starting cup use with an IUD, especially if it was inserted recently.
Tips for Safe Use With an IUD
If your doctor has given the go-ahead, these steps can help reduce the risk of IUD displacement when using a menstrual cup and birth control together:
-
Wait for the settling period
Give your IUD at least one full cycle (ideally three) before trying a cup. -
Break the suction before removal
Pinch the base of your cup to release the seal before pulling it out — never tug from the stem alone. Our Finger Grip cup is specially designed to make this step much easier. -
Check your strings regularly
Once a month, feel for your IUD strings to make sure they’re the same length and position. -
Choose the right cup size
A cup that fits well and sits lower in the vagina can reduce the chance of touching the IUD strings. -
Trim the strings if advised
Some healthcare providers will shorten the strings so they’re less likely to be caught during cup removal.
The POM Menstrual Cups are designed for comfort, made from 100% medical-grade silicone, and shaped for an easy seal release.
Signs You Should See a Doctor
Stop using your cup and get checked by a healthcare provider if you notice:
- Your IUD strings feel longer or shorter than before
- You can’t feel the strings at all
- Unusual pain or cramping
- Heavier bleeding than normal
- Suspected pregnancy
Prompt attention helps ensure your IUD is still in the right place and working effectively.
Alternative Products to Consider
If you’re not comfortable using a period cup with a coil, there are other reusable, eco-friendly options like period underwear. POM offers a range of styles, sizes and absorbencies made from GOTS organic cotton or bamboo. Feel free to check out the range to see what’s best for you.
For more guidance on finding the right product, you can take our quiz:
If you have any more questions about period cups, check out our post on Everything you need to know about Menstrual Cups.