Wash your hands, insert a finger to reach the cervix (tip-of-nose firmness), and feel for thin, flexible strings. Check monthly after your period.
You have an IUD now, and the aftercare sheet says to check the strings monthly. Maybe you tried once and weren’t sure what you were feeling. Or maybe you avoided it entirely, worried you might accidentally pull on something or mess up the placement. It’s a common hesitation — inserting a finger into your vagina to feel around your cervix doesn’t come naturally at first. That single touch can give you real clues about whether your IUD is sitting where it should.
The truth is, checking your IUD strings is a straightforward monthly habit that most people with IUDs can learn comfortably. You do not need special tools, and it takes less than a minute. This article walks through exactly what to expect: how to position your body, what your cervix will feel like, what the strings themselves feel like, and — most importantly — what to do if you cannot find them. Let’s clear up the uncertainty so that monthly check feels quick and unremarkable.
What You Are Actually Feeling For
The sensation people worry about most is whether they will know they have reached the cervix. The tip of your cervix has a distinct texture — it is often described as feeling like the tip of your nose. It is firmer than the soft, spongy walls of your vaginal canal. You will feel it at the very top of the vagina, slightly off to one side depending on your anatomy.
Once you locate the cervix, the strings are what you are after. They are made of soft, flexible plastic, and most people describe the texture as similar to thin fishing line or a single strand of dental floss. They should hang down from the cervical opening, and you should be able to sweep them with your fingertip without any poking or prying.
Right after insertion, the strings may feel a bit stiffer or more noticeable. Over the first few weeks and months, they tend to soften and may curl up against the cervix. That softening makes them less obvious to your finger, but it does not mean they have disappeared.
Why Timing Makes a Difference
Your cervix shifts position slightly throughout your menstrual cycle. Picking the right time to check makes the job noticeably easier and cuts down on the fumbling that makes people doubt they are doing it correctly.
- Check after your period ends: This is widely considered the best window for checking. The cervix sits lowest in the vaginal canal after your menstrual bleed, so you have less distance to reach.
- Monthly frequency is enough: For the first three months after insertion, checking every four weeks is a good habit. After that, a monthly check after your period works well.
- The six-week follow-up matters: Your provider will usually schedule a check-up about six weeks after insertion to confirm everything is positioned correctly. That visit is a good benchmark for starting your own at-home checks.
- Avoid checking around ovulation: Around ovulation, the cervix sits higher and feels softer. It is still possible to find the strings, but it can be trickier. If you struggle, wait until your next period.
- Check after a change: If you have recently given birth, there is a slightly higher chance the coil can shift or come out. Checking your pads or tampons for a fallen IUD is a reasonable step if you suspect a problem.
The goal here is to build a simple, low-stakes routine. You do not need to check daily or even weekly. A quick post-period touch gives you reliable information without turning into a chore.
A Quick Note on Anatomy
If you have never felt your cervix before, take your time. Some people find that squatting or putting one leg up on the bathtub makes the reach easier. The cervix is round and firm — once you feel it, you will recognize it again easily.
The Step-by-Step Check
Start by washing your hands thoroughly with soap and water. Find a comfortable position — squatting, sitting on the toilet with your knees apart, or standing with one foot on the edge of the bathtub all work well. Insert your index or middle finger into your vagina and reach toward the top until you feel your cervix. When you sweep your finger across the cervix, you should feel thin strings protruding. The NHS notes that although there are two strings, they will likely two strings feel like one as they hang together.
Run your finger up and down and side to side across the cervix. You are checking that the strings are present and that their length feels consistent with last time. Normal string length usually extends about one to two inches from the cervical opening. If they feel significantly longer or shorter, that change may warrant a call to your provider.
If you can feel the firm plastic of the IUD itself poking through the cervix, that is a sign of displacement, and you should not attempt to push it back in. Similarly, never pull on the strings — they are anchored to the IUD, and tugging could dislodge it. If anything feels off, backup contraception and a visit to your clinician are the right next steps.
| What You Feel | Likely Meaning | Action |
|---|---|---|
| Thin, flexible strings at the cervix | Normal position; IUD is in place | Continue monthly checks |
| No strings felt, no other symptoms | Strings may be curled up in the cervical canal | Use backup contraception; call provider for a string check |
| Firm plastic poking from cervix | IUD is partially expelling or displaced | Do not touch; call provider immediately |
| Strings feel much longer than before | IUD may have moved lower into the cervix | Use backup contraception; check with provider |
| Strings feel shorter or missing after childbirth | Coil may have been expelled | Check pads; use backup contraception; call provider |
Your finger is a surprisingly reliable tool for catching displacement early. A study indicated around 46% of participants were able to successfully palpate their strings at home. If you find it difficult at first, practice during your next cycle.
What to Do When You Cannot Feel the Strings
It happens to a lot of people. One month you feel the strings clearly, the next month your search comes up empty. Panic is common, but it is rarely necessary. Here is a logical order of steps to take when your finger finds nothing.
- Do not panic, recheck later: Try checking at a different time of day or in a different position. The cervix moves, and squatting versus sitting can change the reach. Wait a day or two and try again.
- Check your pads or tampons: If you recently had a period, look to see if the IUD fell out without you noticing. This is more common after childbirth, but worth ruling out anytime.
- Use backup contraception immediately: Until you confirm the IUD is in the right place, use condoms or another barrier method. Relying on an IUD whose position you are unsure of carries a small risk of pregnancy.
- Call your provider for a string check: A clinician can quickly insert a speculum, locate the strings or confirm they are gone, and let you know exactly what is going on. That visit is the definitive way to resolve the worry.
Some sources estimate around 18% of people with IUDs will experience not being able to feel their strings at some point. Usually, it just means the strings have coiled up inside the cervical canal, which is harmless. But a quick medical check clears the uncertainty completely.
Partners, Sex, and String Sensation
IUD strings do not disappear during sex, but their feel does change over time. Right after insertion, the strings can feel noticeable or even slightly pokey to a partner during intercourse. This usually resolves within a few weeks as the strings soften and curl back against the cervix.
If a partner does feel the strings during sex, it is generally harmless. Long strings are not dangerous on their own. The cervix itself is a useful landmark here — Healthline explains the like tip of nose, and the strings should feel like thin threads crossing that firm surface. If a partner feels something sharp or a hard lump, that is a different conversation and worth a call to your provider.
Some people find that their partner feedback is actually a helpful reminder. If your partner mentions feeling the strings, it is a good prompt to do your monthly check. And if they suddenly stop feeling them when they used to, that is another data point to follow up on.
| When to Check | What to Check | Red Flags |
|---|---|---|
| Once a month, after your period | Strings at the cervix, 1–2 inches long | Missing strings, felt plastic, lengthening |
| Six-week post-insertion follow-up | Provider confirmation of placement | Any pain or abnormal bleeding |
| After childbirth or suspected expulsion | Check pads for fallen IUD | Missing strings plus new pain or bleeding |
The Bottom Line
Checking your IUD strings is a quick monthly habit that gives you real reassurance about your birth control. You do not need medical training — clean hands, a comfortable position, and knowing what your cervix and strings should feel like is all it takes. If you cannot find them, backup contraception and a call to your provider are the safe, straightforward response.
Your gynecologist or the clinician who placed your IUD knows your specific device and uterine anatomy best — a brief office visit can clear up string concerns fast.
References & Sources
- Nhs. “A Guide to Checking Your Coil String Mar24” When checking, run your finger up and down and side to side across the cervix; although there are two strings, they will feel like one.
- Healthline. “Iud Strings” The cervix feels like the tip of your nose, and you should feel the strings hanging down before your finger reaches it.