Cap or diaphragm vs Copper coil (IUD)
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Overview
Rated 4.0
16 reviews
During or before sex
Frequency
84% - 94%
Effectiveness
None
Blood clot risk
None
Effect on fertility
Rated 3.5
594 reviews
5 - 10 years
Frequency
Over 99%
Effectiveness
None
Blood clot risk
None
Effect on fertility
Cap or diaphragm ingredients
Copper coil (IUD) ingredients
What Lowdown reviewers say
Benefits: What this contraceptive can help with
There are no benefits that are recognised in scientific research or guidelines for this contraceptive
There are no benefits that are recognised in scientific research or guidelines for this contraceptive
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Check out our latest reviews
Real life reviews from people like you
Cap or diaphragm reviews
16 reviews
Used for 1 - 3 mo
22 years old
🇬🇧 UK
• 2 weeks ago
Top side effects not reported
0 helpful
0 comments
Used for 3 - 6 mo
27 years old
🇬🇧 UK
• 6th Apr 25
I’ve enjoyed using the cap around my fertile window but struggle to feel 100% confident I have inserted it correctly. When removing the cap I notice a lot of discharge but not after use, only when removing. Way better than the pill or condoms for me.
Top side effects not reported
0 helpful
0 comments
Used for 3 - 5 yr
Lowdown user
🇬🇧 UK
• 13th May 24
Apart from the issue I'm currently dealing with (it getting stuck inside of me), I LOVE the diaphragm. I found out I wasn't never fitted (which is why it kept getting stuck upon removal), so my new, awesome doctor actually sized me. It's easier than popping in a tampon once you learn how to do it and then ya pop it out the morning after sex. No side effects, no hormones, no emotional hangover. It's very hard to find though. Pharmaceutical companies don't want women to buy one silicone object that lasts for the rest of your life, so finding the right size and actually getting it has been a challenge. My mom used it and only got pregnant to have me (her only child) and I've been using it for 5+ years with no issues.
Top side effects not reported
0 helpful
0 comments
Used for 1 - 3 mo
22 years old
🇬🇧 UK
• 2 weeks ago
Top side effects not reported
0 helpful
0 comments
Used for 3 - 6 mo
27 years old
🇬🇧 UK
• 6th Apr 25
I’ve enjoyed using the cap around my fertile window but struggle to feel 100% confident I have inserted it correctly. When removing the cap I notice a lot of discharge but not after use, only when removing. Way better than the pill or condoms for me.
Top side effects not reported
0 helpful
0 comments
Used for 3 - 5 yr
Lowdown user
🇬🇧 UK
• 13th May 24
Apart from the issue I'm currently dealing with (it getting stuck inside of me), I LOVE the diaphragm. I found out I wasn't never fitted (which is why it kept getting stuck upon removal), so my new, awesome doctor actually sized me. It's easier than popping in a tampon once you learn how to do it and then ya pop it out the morning after sex. No side effects, no hormones, no emotional hangover. It's very hard to find though. Pharmaceutical companies don't want women to buy one silicone object that lasts for the rest of your life, so finding the right size and actually getting it has been a challenge. My mom used it and only got pregnant to have me (her only child) and I've been using it for 5+ years with no issues.
Top side effects not reported
0 helpful
0 comments
Copper coil (IUD) reviews
594 reviews
Used for 1 - 3 mo
28 years old
🇬🇧 UK
• 3 days ago
Personally, I would never get another coil again. The reason for 2 stars is I actually had the copper coil inserted in 2018 and it was okay but I had it removed in 2021 after asking for it to be removed for over a year. My periods were heavier as expected, but I also had thrush every month, BV multiple times and it just became so uncomfortable dealing with this constantly. I had the copper coil again this year (march 2025) and it was awful. The insertion this time took an hour compared to the 10 minutes last time. I was in so much pain I was heaving, I have had three babies and this was worse than birthing a child. They finally got it in and I ended up with a mild infection probably due to how long and how many attempts it took. A week later it started to settle down 🤞🏼 however almost three months later and I'm having it removed next week. I don't know if it's misplaced (they will be checking this first) but I feel it 'stabbing' me randomly every day. I will be walking and suddenly stop and feel like it's stabbing me or trying to come out, but I can still feel the strings. On two occasions it's hurts me during sex which is a red flag. My periods are 10-12 days long and I'm getting through a pack of pads every 1-2 days, plus the thrush is back again. I was offered a replacement however I have declined and I am currently trying to decide which combined pill may be best for me, tho I am nervous about going on the pill now!
Top side effects not reported
0 helpful
1 comments
Used for 18 mo - 3 yr
27 years old
🇬🇧 UK
• 2 weeks ago
Top side effects not reported
0 helpful
0 comments
Used for 12 - 18 mo
30 years old
🇬🇧 UK
• 2 weeks ago
I used to have fairly light and painless periods and I’m now in agony every month and bleeding through my clothes. I have it time to see if it would settle but it’s been a year so I’ve booked to get it removed and can’t wait.
Top side effects not reported
0 helpful
0 comments
Used for 1 - 3 mo
28 years old
🇬🇧 UK
• 3 days ago
Personally, I would never get another coil again. The reason for 2 stars is I actually had the copper coil inserted in 2018 and it was okay but I had it removed in 2021 after asking for it to be removed for over a year. My periods were heavier as expected, but I also had thrush every month, BV multiple times and it just became so uncomfortable dealing with this constantly. I had the copper coil again this year (march 2025) and it was awful. The insertion this time took an hour compared to the 10 minutes last time. I was in so much pain I was heaving, I have had three babies and this was worse than birthing a child. They finally got it in and I ended up with a mild infection probably due to how long and how many attempts it took. A week later it started to settle down 🤞🏼 however almost three months later and I'm having it removed next week. I don't know if it's misplaced (they will be checking this first) but I feel it 'stabbing' me randomly every day. I will be walking and suddenly stop and feel like it's stabbing me or trying to come out, but I can still feel the strings. On two occasions it's hurts me during sex which is a red flag. My periods are 10-12 days long and I'm getting through a pack of pads every 1-2 days, plus the thrush is back again. I was offered a replacement however I have declined and I am currently trying to decide which combined pill may be best for me, tho I am nervous about going on the pill now!
Top side effects not reported
0 helpful
1 comments
Used for 18 mo - 3 yr
27 years old
🇬🇧 UK
• 2 weeks ago
Top side effects not reported
0 helpful
0 comments
Used for 12 - 18 mo
30 years old
🇬🇧 UK
• 2 weeks ago
I used to have fairly light and painless periods and I’m now in agony every month and bleeding through my clothes. I have it time to see if it would settle but it’s been a year so I’ve booked to get it removed and can’t wait.
Top side effects not reported
0 helpful
0 comments
Used for 18 mo - 3 yr
22 years old
🇬🇧 UK
• 3 weeks ago
I never had acne before but now I constantly have break out, my skin has not been pimple free in 2 years
Somewhat negative mood
2 more effects
0 helpful
0 comments
Used for 3 - 5 yr
37 years old
🇬🇧 UK
• 7th May 25
After having children the contraceptive pill didn’t seem to work, I tried various types and had breakthrough bleeding. I decided to try the copper coil. Insertion was so painful but my periods have been regular and through tracking apps I’ve got to understand my cycle and know what my hormones are doing which I quite like.
Very positive mood
0 helpful
0 comments
Used for 3 - 6 mo
27 years old
🇬🇧 UK
• 28th Apr 25
The copper coil hurt the first day of insertion but then immediately settled. My periods have become slightly heavier and cramps a bit more painful but still very manageable with just paracetamol and ibuprofen. I am lucky in that my periods only last 4-5 days anyway. My moods change with a normal cycle pattern, I get some acne during my luteal phase. I love having protection but not having the negative impacts on my MH like hormonal contraception had. Would recommend.
Somewhat positive mood
1 helpful
0 comments
Used for 3 - 6 mo
29 years old
🇬🇧 UK
• 27th Apr 25
It's so hard finding contraception that doesn't have side effects and I wanted a hormone free form, so opted for copper IUD. Insertion is manageable, with painkillers beforehand. The first period was tough, I invested in a tens machine pad but the cramps were hard, but not worse than the worst period I've had. Second period non existent, literally three days and barely any blood, but third was heavy and lasted for 10 days. I stopped using the coil not because of any of this alone, but because I'm sure the inflammation in my body was making me uncharacteristically anxious. So hard to put my finger on, but since I got it removed it's been a weight off my shoulders. I'm now worrying that hormonal IUD will make me more anxious, and I haven't had it put in yet. It's overall not been too awful- I wouldn't not recomend it but I had it put in for emergency contraception so hoping there is a better solution out there without the anxiety side effects.
Somewhat negative mood
1 helpful
0 comments
Used for 18 mo - 3 yr
24 years old
🇬🇧 UK
• 26th Apr 25
Really liked this. Tried hormonal methods and ended up having a negative experience with them so had a go at this one. Works great. Most problems stopped after 6 months, like heavier bleeds and back pain etc. Eventually got down back to normal but it takes time to adjust. Genuinely made my life so much better, sex is great and I don't need to worry about hormones or my menstural cycle.
Very positive mood
1 more effect
0 helpful
0 comments
Used for 18 mo - 3 yr
25 years old
🇬🇧 UK
• 9th Apr 25
Seriously heavy periods (wearing nightime pads and a tampon and still bleeding through my clothes in like an hour) and sometimes extruciating cramping. A lot of spotting between periods also which I've never experienced before. Nurse has told me that the coil should not affect my bleeding and I've gone straight from the mini pill to this so it may have been that the pill was improving my regular symptoms more than I realised.
Decreased sex drive
1 more effect
1 helpful
0 comments
Used for 18 mo - 3 yr
32 years old
🇬🇧 UK
• 8th Apr 25
I chose to have the copper IUD inserted in January 2023 because I'd had a bad experience previously with the mini pill (mood swings, decreased libido, and vaginal dryness) and I wanted to try a non-hormonal contraception. The process of getting it inserted was one of the most painful things I've ever experienced with severe pain, cramps, and dizziness. The doctor and nurse I had were wonderful and very reassuring, which made the process slightly easier. I would however, highly recommend anyone thinking of getting it to ask for pain relief if it's available. I'm certain it would have made the process much better and less traumatic for me. What followed was 6 months of intense cramping and spotting at random times of the month and extremely painful, heavy, and long (between 10-12 days) periods (I was lucky to have very light periods before going on any contraception which is one of the reasons I opted for the copper IUD). After 6 months or so my periods settled down to become shorter (5-6 days) and more regular but remained extremely heavy with lots of dark blood clots and severe cramping/back pain - to the point where I would have to take days off work and couldn't exercise normally because I felt sick/dizzy from the pain. The severe cramps started like clockwork on the 7th day before my period was due and continued until the end of my period meaning I was having up to two weeks a month of severe cramping. I also experienced cramps and thick, brownish discharge/spotting around ovulation. Other than the heavy, painful periods, I experienced none of the mood swings, weight gain, or loss of libido that I'd experienced on hormonal contraception, so the copper IUD was great for that. If anything, I experienced a notable increase in my libido! I chose to have the IUD removed about two weeks ago, after just over two years, because I was finding it increasingly difficult to cope with the intensely painful cramps and heavy bleeding and I developed severe iron deficiency anemia, likely due to my heavier periods. I was nervous about the removal process after finding the insertion process so difficult but it was significantly less painful and super quick. I had some light spotting afterward and some minor cramps but nothing too bad. I'm yet to have a period after removal and I'm, so far, two days late (confirmed not pregnant). I would normally have had at least a week of intensely painful cramps by now but so far, nothing. Overall, the copper IUD was great at the times of the month I wasn't bleeding or ovulating and I liked not having any of the side effects that come with hormonal birth control, but it ultimately wasn't worth the heavy and painful periods/iron deficiency anemia for me!
Somewhat negative mood
0 helpful
0 comments

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