IUD bleeding changes in almost every case during the first three to six months, and which way it goes depends on the type. A hormonal IUD usually makes your bleeding gradually lighter. A copper IUD often makes it heavier and longer in the first year. Irregular spotting in that opening period is normal with both.
The difficulty is that "normal" covers a wide range here. So below is what to expect month by month per type, and where the line sits beyond which it is worth having checked.
What happens per type, month by month?
| Period | Hormonal IUD | Copper IUD |
|---|---|---|
| First days | Light bleeding, cramps | Light bleeding, cramps |
| Month 1 to 3 | Irregular spotting, often days on end | Heavier and longer periods |
| Month 3 to 6 | Gradually decreases | Stays heavier, sometimes slightly less |
| After 6 months | Usually clearly lighter | Settles, often still above your old level |
| After 12 months | For some the period stops entirely | Usually back towards your own pattern |
These patterns are averages. Some women find a hormonal IUD settles within a month; for others the spotting runs half a year. Both happen.
Do you still have a cycle with an IUD?
With a copper IUD, yes. There is no hormone in it, so your ovulation and cycle continue as before. Only your bleeding changes.
With a hormonal IUD it is subtler. The levonorgestrel works mainly locally, so many women keep their own ovulation while the uterine lining stays thin. Your bleeding disappears, but the cycle underneath keeps turning. So with this type, an absent period is usually not a sign that something has stalled. Read hormonal IUD side effects for what happens to your hormone levels exactly.
When is the bleeding too much?
There is no home measurement in millilitres, so practical signals work better. Contact your GP if you soak through a tampon or pad within an hour, if you pass clots larger than a two-euro coin, if you bleed for more than seven days straight, or if your bleeding is still heavier than before placement after six months.
Call the same day for fever, severe one-sided abdominal pain or foul-smelling discharge. Those are different problems from a settling-in pattern.
Why heavy bleeding costs you iron
This is the part missing from most IUD pages, and it is precisely the part that is measurable. Blood contains iron, so structurally more blood loss means structurally more iron loss. Menstrual blood loss is the leading cause of iron deficiency in women of reproductive age.
What often goes wrong here: your haemoglobin can still read normal while your store is nearly empty. The body protects haemoglobin and drains the reserve first. That reserve is what ferritin measures.
| What you measure | What it is | When it falls |
|---|---|---|
| Ferritin | Your iron store | First, often months earlier |
| Serum iron | The iron circulating right now | Swings daily, less useful alone |
| Haemoglobin | Oxygen transport itself | Last, only once anaemia sets in |
If you notice fatigue that sleep does not fix, breathlessness on stairs, cold hands or more hair shedding than usual, that is the combination where a ferritin blood test becomes useful. For the wider picture with iron, transferrin and saturation, the iron deficiency test fits better. The iron values reference table shows which numbers belong where.
What can be done about heavy bleeding with an IUD?
That depends on the cause and belongs with your GP. What tends to be discussed in the Netherlands ranges from waiting out the first months, through medication that reduces blood loss, to switching to a different device. For heavy menstrual bleeding, the highest-dose hormonal IUD is often used as a treatment rather than as contraception.
Also read tranexamic acid for heavy periods if your doctor mentions it, and copper IUD experiences if you are unsure whether your pattern still counts as ordinary.
Frequently asked questions
How long do you bleed after an IUD is placed?
Light bleeding for a few days is normal. Irregular spotting can continue for three to six months, especially with a hormonal IUD.
Do you still get periods with a hormonal IUD?
Often yes, but much lighter. For a share of women the period stops entirely over time, and with this type that is not worrying.
Is heavier bleeding with a copper IUD normal?
In the first year it is common. If it stays heavier than you were used to after that, discuss it with your GP.
Can an IUD cause anaemia?
Persistent heavy bleeding can drain your iron stores and lead to anaemia over time. Ferritin falls first, so it is the value that shows something earliest.
References
- NHG-Standaard Anticonceptie, Dutch College of General Practitioners
- NHG-Standaard Vaginaal bloedverlies, Dutch College of General Practitioners
- Thuisarts.nl, information on heavy bleeding and on the IUD
- World Health Organization, guidance on iron deficiency and ferritin as a measure of stores
- Cochrane Database of Systematic Reviews, reviews on treatment of heavy menstrual bleeding
Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.
Author
Lunarahealth
Dr. Naimi, BIG-registered physician, oversees the medical standards behind our content and assessments. Read our medical policy
