Duphaston experiences, side effects and how it works

Duphaston contains dydrogesterone, a progestogen you usually take twice a day from day 11 to day 25 of your cycle. Duphaston experiences are mostly quiet: many women mainly notice that their cycle becomes predictable, with nausea, tender breasts and headache as the side effects reported most often.

What we find interesting about this drug: it closely resembles your own progesterone, but it is not the same thing. That difference determines exactly how you should read a progesterone result while taking it, and almost no patient leaflet mentions it.

What is Duphaston and how does it work?

Duphaston is the brand name for dydrogesterone. It acts on your womb lining the way your own progesterone does after ovulation: it matures and stabilises the lining, so your bleed arrives at a predictable moment or an implantation gets a chance.

Unlike many older progestogens, dydrogesterone usually does not suppress your ovulation. It is therefore not contraception, and that is precisely why it can be used when you are trying to conceive.

After ovulation your body makes progesterone itself, in the corpus luteum. If ovulation does not happen, or that corpus luteum is weak, the second half of your cycle stays thin. Duphaston tops up that part.

What is Duphaston prescribed for?

Indications range from an irregular cycle to support in early pregnancy. The dosing schedule differs per reason, which explains why experiences vary so much. The schedules below come from the patient leaflet and the Dutch Farmacotherapeutisch Kompas.

Your doctor picks the schedule and adjusts it to your cycle. If you take Duphaston while trying to conceive, the start day matters: starting too early can get in the way of ovulation.

Duphaston experiences: what do users report?

Women often describe Duphaston as a mild drug, certainly compared with the pill. The gain mentioned most is predictability: you know when your bleed is coming again. The complaints that do come up usually play out in the first cycle or two.

What comes back positively:

• A cycle that finds a rhythm again after years of irregularity
• Fewer breakthrough bleeds and less spotting
• With PMS, sometimes a calmer second half of the cycle
• No suppression of ovulation, so usable when trying to conceive

What women find difficult:

• Nausea in the first days after starting
• Tender or swollen breasts
• Headache and a bloated feeling
• Tiredness, or restlessness in the evening
• For some, a lower mood on the days they take it

Picture two women of 31 with a cycle of 40 to 60 days. One takes Duphaston from day 11 and has a 30 day cycle within two months. The other gets the same prescription, but has a prolactin of 780 mIU/l. Her cycle looks tidy on paper while the cause stays untreated. The same drug, a different question.

Side effects of Duphaston

The side effects reported most are nausea, abdominal pain, headache or migraine, tender breasts and breakthrough bleeding. They are usually mild and often ease as your body adjusts. For breakthrough bleeding, your doctor sometimes raises the dose temporarily.

Less often reported are mood changes, dizziness, fluid retention and skin complaints. In Dutch user reports, fluid retention comes up strikingly often, sometimes weeks after stopping.

Contact your doctor about persistent heavy bleeding, jaundice, severe abdominal pain, or signs that could point to a blood clot such as a painful swollen leg or breathlessness.

Duphaston and your progesterone level: watch for this

This is the point we explain most often. Dydrogesterone is not progesterone, and most laboratory progesterone assays do not measure it. So while you take Duphaston, your measured progesterone can look low even though the drug is doing its job.

That makes a progesterone test during use hard to interpret. If you want to know whether you ovulate on your own, test at a moment your doctor advises, usually about 7 days after the presumed ovulation and separate from the course.

Our progesterone reference values table per cycle phase shows which values fit which phase, and when to test progesterone covers the right timing. You can have your progesterone tested with an assessment by a BIG-registered doctor.

Duphaston in early pregnancy

Dydrogesterone is sometimes prescribed for threatened miscarriage or after recurrent miscarriage. The research is extensive but not clear-cut, and outcomes differ between groups of women.

A Cochrane network meta-analysis from 2021 looked at progestogens for preventing miscarriage and found the clearest signal in women with previous miscarriages and bleeding in early pregnancy (PMID 33872382). A 2025 network meta-analysis compared different progestogens in a first threatened miscarriage and saw differences between drugs (PMID 39698935).

What that means for you depends on your history. This weighing belongs with your doctor or gynaecologist, not with a table on the internet. To understand what happens in those first weeks, read about hCG levels in early pregnancy.

Alternatives to Duphaston

Which alternative fits depends mostly on your goal: regulating a cycle, reducing bleeding, or supporting the second half of the cycle when trying to conceive.

• Micronised progesterone (Utrogestan), which does show up as progesterone in blood
• Primolut N with norethisterone, which intervenes more strongly in bleeding
• A hormonal coil when bleeding is the main problem and you are not trying to conceive
• If ovulation is absent: letrozole or clomiphene, which induce ovulation rather than top up the second half

That last distinction matters and is often missed. Duphaston makes your cycle more regular on paper, but it does not induce ovulation. When you are trying to conceive, that is a real difference.

Frequently asked questions

How soon after Duphaston does your period come?

Most women bleed 2 to 4 days after taking the last tablet. If that bleed does not arrive, take a pregnancy test before starting another course. Discuss it with your doctor if nothing happens.

How many hours between two Duphaston tablets?

On two tablets a day you keep about 12 hours between them, for example morning and evening. On three times a day that becomes roughly 8 hours. A fixed time helps you avoid missing a dose.

Does Duphaston help with implantation?

In women with a demonstrably weak second cycle half, progestogen support can be useful, and in IVF luteal support is standard. For women with a normal cycle the evidence is much weaker. This is genuinely tailored work with your doctor.

Does Duphaston work as contraception?

No. Dydrogesterone usually does not suppress ovulation, so you can become pregnant while taking it. Use contraception if you want to prevent that.

Can you stop Duphaston whenever you want?

Usually you finish a course through to the agreed cycle day, because your bleed follows from it. Stopping halfway can bring unexpected bleeding. Check with the doctor who prescribed it if you are unsure.

Duphaston is one of the quieter hormonal drugs in gynaecology, and for many women it brings exactly the predictability they were after. Stay sharp on one thing though: a regular bleed on paper is not the same as a restored ovulation. Ask your doctor directly which of the two is your goal.

Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.

References

• Farmacotherapeutisch Kompas. Dydrogesterone. Accessed 2026.
• Thuisarts.nl. I have irregular periods. Accessed 2026.
• Devall AJ, et al. Progestogens for preventing miscarriage: a network meta-analysis. Cochrane Database of Systematic Reviews, 2021. PMID 33872382.
• Efficacy and safety of different progestogens in women with first threatened miscarriage: a network meta-analysis. International Journal of Gynaecology and Obstetrics, 2025. PMID 39698935.
• Efficacy of progesterone on threatened miscarriage: difference in drug types. Journal of Obstetrics and Gynaecology Research, 2019. PMID 30632226.