The short explanation
It can matter, and it is worth raising even if pregnancy is not on your mind. When ovulation is infrequent the lining of the womb can be exposed to oestrogen for long stretches without the progesterone that normally follows ovulation, and over years that is associated with the lining becoming thickened. Most clinicians want to see a bleed at least every few months for that reason, and there are several ways to arrange one. Very infrequent periods are also worth a thyroid and prolactin check, because they are not always PCOS even when PCOS has been diagnosed.
What depends on your situation
The parts of this that change from woman to woman. Uncertainty is stated, not hidden.
- How much it matters depends on how long the gaps are, your weight, your blood pressure and blood sugar, and whether anything else could explain it. Someone bleeding four times a year is in a different position from someone who has not bled in eighteen months.
- Treatment aims at a goal rather than at the diagnosis: protecting the lining, managing hair or skin changes, restoring cycles, or supporting a pregnancy. They call for different things, and you can say which one matters most to you.
What this answer cannot determine
The boundary of online education. These need a clinician who can see you.
- This cannot tell you how long your own gaps have been, what your lining looks like, or whether anything needs doing now. Only an examination, a scan and your own history can answer that.
Questions for your clinician
Take these with you. You can add any of them to an appointment card.
- How often should I be having a bleed, given my history?
- What are the options for arranging one, and what does each involve?
- Should anything else be ruled out before we settle on PCOS?
- What would make you want to look at the lining of my womb?
When to seek help
Clinician-approved guidance for this topic. When in doubt, being seen is never the wrong choice.
- See a clinician promptly for bleeding that is much heavier than usual, bleeding between the gaps, or any bleeding after a year or more with none at all. Any of those is worth checking rather than adding to the pattern.
Sources
The evidence this explanation is built on.
No sources recorded yet.
Who wrote and reviewed this
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- Author
- AskHer Editorial AskHer's editorial team — not an individual clinician Works in English, தமிழ், हिन्दी
- Clinical reviewer
- Nobody yet No clinician has signed this answer off. That is what the “Editorially reviewed” badge means, and why it does not say “Clinically reviewed”. It was written and checked by AskHer’s editorial team, and it is queued for a clinician who works in this area. No sources are recorded against it yet.
- Review status
- Editorially reviewed
- Last reviewed
- Last reviewed 26 September 2026
- Version
- 1
Correction history
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No corrections have been made since this answer was first published.
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