Intrauterine devices (IUDs) are highly effective contraception—designed to be long‑acting, low‑maintenance, and mostly forgettable. Hormonal IUDs often lighten or eliminate periods entirely, though some users will still experience monthly or occasional bleeding. They are ideal for women seeking cycle control as they move from perimenopause to hormone therapy. Some women worry about dislodging an IUD with a menstrual cup, but that is uncommon.
For those who do have periods with an IUD in place, menstrual cups remain a safe, effective, and environmentally friendly option. Many menstrual cups sit mid‑vagina, well below the cervix, and never come into contact with the IUD strings at all. Refer to our basic guide.
Importantly, no studies currently show that menstrual cup use decreases the contraceptive effectiveness of an IUD.A recent report in Contraception described seven cases of IUD expulsion associated with menstrual cup use. While this does not establish causation, it reinforces the need for awareness, proper cup technique, and routine string checks.
Below, we break down how cups sit in relation to the cervix, which cup shapes may interact more closely with IUD strings, and how users can minimize risk while still enjoying cup benefits.
How Menstrual Cups Sit in the Vagina
Menstrual cups don’t all sit in the same place. Position depends on:
- Cervix height
- Cup shape
- Cup firmness
- User’s anatomy
Most cups create a gentle seal at the vaginal walls, not directly on the cervix. But certain designs ride higher and may sit close to—or even around—the cervix.
Understanding these differences helps patients choose the right cup if they also use an IUD.
Which Menstrual Cups Tend to “Hug” the Cervix?
Some menstrual cups sit higher in the vagina and can seal very close to the cervix. These cups are sometimes preferred by users with a high cervix, but they may be more likely to interact with IUD strings.
Cups that tend to hug the cervix are typically:
1. V‑Shaped Cups
These cups are longer and narrower, designed to sit high in the vaginal canal.
Because of their height, they often rest very close to the cervix.
2. High‑Cervix Cups
Cups specifically marketed for high‑cervix users are taller by design.
Their length naturally brings them into proximity with the cervical base.
3. Firmer Cups
Firm silicone “pops open” easily but can create a stronger seal.
Sometimes that seal forms closer to the cervix, depending on anatomy.
These aren’t unsafe—but for IUD users, they require mindfulness during removal to avoid downward traction on the strings.
Cups That Usually Don’t Hug the Cervix
These designs tend to sit lower and more securely in the mid‑vagina, making them favorable options for IUD users:
1. Bell‑Shaped Cups with a Flared Rim
These anchor lower in the vaginal canal and avoid the cervix.
2. Short Cups
Designed for low‑ or average‑cervix users, they do not ride upward as easily.
3. Soft Cups
Softer silicone creates a gentler seal and less upward suction.
For IUD wearers who want to minimize any potential interaction with strings, these styles are often safest.
Practical Tips for Using a Menstrual Cup with an IUD
✔️ Break the seal before removing the cup
Pinching the base reduces suction and prevents downward pulling.
✔️ Check your strings after each cycle
A small change is normal, but major length changes should be evaluated.
✔️ Be cautious during the first 1–3 months after IUD insertion
Expulsion risk is highest early on—some providers recommend avoiding cup use during this window.
✔️ If strings feel longer, shorter, or missing—call your provider
Any new pelvic pain, increased cramping, or heavier bleeding also warrants evaluation.
Bottom Line
Menstrual cups and IUDs can absolutely be used together successfully for most people. The key is understanding how cup shape influences position, how that position relates to the cervix and IUD strings, and how to remove a cup safely.
With the right cup and good technique, patients can enjoy the comfort, sustainability, and cost savings of menstrual cups while maintaining the reliability of their IUD.
If your menstrual cup is dislodging frequently come in to discuss whether your periods are bleeding too heavily and causing the issue.
