Hormonal coil (IUS) and breast enlargement

How our community feel they have been impacted by breast enlargement on hormonal coil (IUS)

Data is taken from self reported Lowdown user reviews

None or not sure

74%

A bit

14%

Quite a bit

7%

A lot

4%

A great deal

2%

Out of the 852 reviews for hormonal coil (IUS), 224 people (26%) reported breast enlargement.

Reviewers that reported breast enlargement as a side effect

Data is taken from self reported Lowdown user reviews

Used for 1 - 3 mo
24 years old
🇬🇧 UK
  •  3 days ago

Have only had the coil for 2 months (although feels like much longer) so will give it a bit more of a chance, I also acknowledge that everyone reacts differently and my side effects seem to be less common, however in my experience and at this point in time, the negative side effects FAR outweigh the positives. My GP talked me into trying Mirena for managing my PCOS and the excruciating pain I would experience on occasion from burst ovarian cysts, as well as the birth control aspect. I’ve gone from an abnormally long (but fairly painless) cycle to an even longer one, bleeding and in moderate-severe pain almost daily. If my stomach doesn’t hurt, my head will be, or both. I’m not joking when I say I look pregnant from abdominal swelling on top of it all.

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Worse skin

1 more effect

0 helpful

0 comments

Used for 18 mo - 3 yr
23 years old
🇬🇧 UK
  •  5th Aug 25

I really like the Mirena Coil, especially as the combined pill was my previous contraception which negatively affected my mood. I had a lot of spotting for the first month and now have the very occasional spotting, but it's great not having a period anymore.


Somewhat positive mood

1 more effect

0 helpful

0 comments

Used for 3 - 6 mo
38 years old
🇬🇧 UK
  •  11th Jul 25

I got the coil fitted to control heavy periods with contraception as a bonus. I’m aware I might be still in the settling down phase, this is my experience so far. Fitting was uncomfortable but I’ve had 3 vaginal birth so nothing touches that! Cramps for a few days but settled down. So far I have been bleeding most of the time since having it fitted, not heavy, light, but constant and irregular patterns. Very annoying. Low self esteem and low mood. Weight gain, despite being more physically active and eating healthily. Increase in headaches and migraines. Generally unimpressed at the lack of connection with healthcare professionals and Mirena coil users. So many women reporting poor experience yet doctors aren’t relaying this information. Will be having it removed. I choose control over my body over convenience.


Somewhat negative mood

2 more effects

0 helpful

0 comments

Hormonal coil (IUS) common side effects

Data is taken from self reported Lowdown user reviews

62% of hormonal coil (IUS) reviewers reported period like cramps

43% of hormonal coil (IUS) reviewers reported tender breasts

40% of hormonal coil (IUS) reviewers reported vaginal discharge

29% of hormonal coil (IUS) reviewers reported lower back pain

26% of hormonal coil (IUS) reviewers reported breast enlargement


Possible hormonal coil (IUS) side effects

Data is taken from self reported Lowdown user reviews

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