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BE CAREFUL: USING MENSTRUAL CUP WITH IUD TIP

Feb 23, 2024

Quick Answer

Using a menstrual cup with an IUD is not risk-free. Cup use has been linked with IUD expulsion, especially in research involving copper devices. Ask your OB/GYN before using one. If you choose a cup, release its seal before removal and avoid pulling the IUD strings. Careful technique does not guarantee that your IUD will stay in place. [1] [2] [3]

Key Takeaways

Discuss cup use with your OB/GYN before you start.
Release the seal and avoid pulling the IUD threads.
If you suspect movement, use backup contraception and get checked.

These precautions come from manufacturer and clinical guidance. They do not guarantee prevention of expulsion. [3] [4] [6]

You want a period product that works for you without putting your birth control at risk. I want you to have a clear answer before you make that choice. Here is what the evidence can tell you, what it cannot, and what to do if something feels different.

How can a menstrual cup dislodge an IUD?

A cup sits in your vagina, while an IUD sits inside your uterus. The IUD’s removal threads extend through your cervix into your vagina. Pulling those threads can move the device. Researchers also propose pressure from removing a sealed cup as a possible mechanism, but have not established exactly how every cup-associated expulsion happens. [1] [4]

The seal and the strings are separate concerns

A menstrual cup forms a seal against the vaginal walls. Releasing that seal before taking it out is manufacturer guidance. It does not address every possible interaction with the IUD threads, so avoid catching or pulling them as well. [3] [4]

Expulsion means an IUD partly or completely comes out of the uterus. A displaced or expelled IUD can compromise pregnancy protection. A cup collects period blood and is not a contraceptive. [4] [5]

For a broader introduction to the anatomy discussed here, read my guide to what is going on with your vaginal health. This article focuses on the interaction between your period product and your IUD.

Is the risk different with copper and hormonal IUDs?

Research does not establish that a hormonal IUD is safer to use with a cup than a copper IUD. Much of the stronger recent evidence concerns copper devices, so it cannot give you a reliable Mirena-versus-Paragard risk estimate. [1] [2]

I would not choose a cup based on a claim that one IUD’s strings are softer, thinner or less likely to get caught. That is not an established clinical shortcut for predicting your risk.

Copper IUDs, including Paragard. A 2024 analysis studied two copper devices. Findings differed by device, and accidental self-removal was more frequent among cup users with both devices studied.
Hormonal IUDs, including Mirena. That study did not evaluate hormonal IUDs. Missing comparative data does not mean that hormonal devices have no cup-related risk.

The distinction is about the limits of the evidence, not a proven ranking of which device works best with a cup. [2]

What the research actually shows

The 2024 study was a secondary analysis of a randomized IUD trial. Participants were randomized to an IUD, not to menstrual cup use. It found a higher overall expulsion association for the NTCu380-Mini, but not for the TCu380A device used by Paragard. That does not prove Paragard cup use is risk-free. [2]

A 2023 systematic review found a possible association between cup use and IUD expulsion, with limited and conflicting evidence. It called for better studies of the risk and ways to reduce it. [1]

These findings do not support one universal percentage or a blanket “four times the risk” claim for every cup and IUD combination. Ask which device a study examined before applying its results to your own contraception.

How long after IUD insertion can you use a cup?

There is no proven waiting interval that makes menstrual cup use with an IUD risk-free. Ask your inserting clinician when to restart vaginal period products and follow your device and cup instructions. Research has not established that waiting a particular number of weeks prevents cup-associated expulsion. [1]

Bring the exact IUD name and cup model to that conversation. Ask about your insertion date, any previous expulsion, and how you will check for a change in the threads. Write down the advice so you can refer to it when your next period starts.

How to remove a menstrual cup more carefully

For a conventional cup, release the seal before drawing it downward. The stem helps you find the cup’s base. It is not a handle for pulling a still-sealed cup out. Follow the instructions for your particular product. [3]

The following sequence adapts the manufacturer’s removal instructions, with the IUD-thread precaution from device guidance. It describes technique, not a method proven to eliminate displacement. [3] [4]

Wash your hands. Use soap and water before reaching for the cup.
Get comfortable. Sit, stand or squat and let your pelvic muscles relax.
Find the base. Use the stem as a guide without tugging it.
Release the seal. Gently pinch the cup’s base with your thumb and index finger.
Avoid the IUD threads. Take care not to grip or pull them during removal.
Ease the cup out. Hold its base and gently wiggle it out, keeping it upright. Empty and clean it according to its instructions.

If removal is difficult or painful

Stop pulling against resistance. Relax and try to release the seal again. If you cannot remove the cup or removal causes pain, get medical help instead of continuing to pull. [3]

Keep your cup instructions accessible on your phone. If you need help, tell the clinician that you have an IUD and name the cup you are using. Being specific helps you explain what happened without guessing whether the seal or threads were involved.

What are the warning signs of IUD displacement?

Missing threads, a change in their length, feeling the device itself, or new pain or bleeding can mean your IUD needs checking. Symptoms alone cannot tell you where it is. Expulsion can also happen without you noticing. [4] [5]

You cannot feel threads you could previously feel, or their length seems different.
You feel hard plastic or see the device in the cup or vagina.
You develop new or worsening pelvic pain, pain during sex, or bleeding that concerns you.
You think you could be pregnant.

Fever, chills and unusual discharge also need attention because they can signal infection rather than displacement. [4] [5]

Follow your device instructions for thread checks and do not pull the threads. Missing strings do not automatically mean the IUD has fallen out. They can retract upward, and a clinician can assess the cause and arrange imaging when needed. [6]

When to call your OB/GYN or seek urgent care

Call promptly if you suspect movement. Avoid vaginal intercourse or use condoms until a clinician confirms the IUD’s location and pregnancy protection. If you recently had sex without backup, ask promptly about emergency contraception. Do not try to push a displaced IUD back into place. [5] [6]

Get urgent assessment for severe pain, heavy bleeding, fever or suspected pregnancy. A pregnancy with an IUD needs prompt evaluation for an ectopic pregnancy, which grows outside the uterus. Sudden severe abdominal pain, fainting or significant dizziness can require emergency care. [4] [5]

I want you to separate ordinary period discomfort from a new change after cup removal. Once your clinician has ruled out a complication, my separate guide to relief for IUD cramps covers comfort measures. Those measures do not correct a displaced device.

When preparing for a non-emergency appointment, note when the pain or bleeding began and whether it followed cup removal. My guide to tracking your period can help you organize those observations. Do not delay urgent care to collect a full cycle of information.

If discharge has changed too, describe what you see and feel to your clinician. My explanation of vaginal discharge colors and meaning offers background for that conversation. A symptom guide cannot confirm your IUD’s position.

For broader questions beyond this cup-and-IUD decision, you can explore my comprehensive vaginal health guide. You do not need to make every period-care decision at once. Start with a clear plan for your contraception and a product you can use comfortably.

Frequently Asked Questions

Should I trim my IUD strings to use a menstrual cup?

Do not cut your IUD strings yourself. Ask your OB/GYN whether any adjustment is appropriate for your device. Research has not established that shorter strings prevent cup-associated expulsion.

Source 1 · Source 4

Is any menstrual cup brand proven safest with an IUD?

The available evidence does not identify a cup brand that reliably prevents IUD displacement. A smaller or softer cup is not a guarantee. Discuss your device and the product instructions with your clinician.

Source 1 · Source 2

Is a menstrual disc proven safer than a cup with an IUD?

The cup studies discussed here do not establish that menstrual discs are safer with an IUD. Do not treat a different product design as proof of lower risk. Ask your clinician about the specific product you want to use.

Source 1 · Source 2

Sources

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