Your period is late, and you want to know if it matters. The honest answer is that it depends on how late, what’s normal for you, and whether pregnancy is possible. Here’s a guide to what each delay usually means.
First: what does “late” actually mean?
A period is late when it hasn’t arrived by the date you’d expect, based on your usual cycle length. Your cycle is counted from the first day of one period to the first day of the next.
The average cycle is about 28 days, but anywhere from 21 to 35 days is normal. So a period that seems late against the average may be right on time for you. If your cycles usually run to 33 days, day 30 isn’t late at all.
The late period checker works this out using your own cycle length rather than an average.
A few days late
This is very common, and usually nothing to worry about. Cycle length naturally shifts a little each month, often because ovulation happens a few days earlier or later than usual. Stress, travel, illness and poor sleep can all nudge it.
What to do: if pregnancy is possible, you can take a test now. Home tests are most reliable from the first day of a missed period.
One week late
Still often within the normal range, especially if your cycles vary. A week’s delay is very commonly explained by later ovulation.
What to do: if there’s any chance you could be pregnant, take a test. If it’s negative and your period still doesn’t come, test again a few days later.
Two to three weeks late
At this point it’s worth looking for a reason. Think about anything that’s changed recently: stress, weight, exercise, sleep, illness or contraception. Read our list of 9 reasons for a late period when you’re not pregnant.
What to do: take a pregnancy test if you haven’t already, and repeat it if the first was negative.
35 days late
There’s an important difference here. A 35-day cycle is normal. But being 35 days past your due date means you have effectively missed a whole period.
Missing one period occasionally can happen without anything being wrong. It’s still a good moment to take stock: test for pregnancy if it’s possible, and note any other symptoms.
Two months late
Missing two periods isn’t unusual, and often has a simple cause. But it’s long enough that you should act on it rather than wait.
What to do:
- Take a pregnancy test if you’ve had sex, even if you used contraception.
- If it’s negative, test again a few days later if your period still doesn’t come.
- Book a GP appointment if you have any other symptoms, such as weight changes, tiredness, new hair growth, or dry or oily skin.
If you’re asking because your partner is two months late, the same advice applies. Being supportive and helping them get a test or an appointment is the most useful thing you can do.
Three months or more
The NHS recommends seeing a GP if you’ve missed three periods in a row. That doesn’t mean something serious is wrong, but it’s worth finding out why. A GP may suggest blood tests to check hormone levels and can look for causes such as PCOS (PMOS) or a thyroid problem.
When not to wait at all
Call emergency services or go to A&E / the ER if you could be pregnant and have:
- Sudden, severe pain in your tummy
- Pain in the tip of your shoulder
- Feeling very dizzy or faint
These can be signs of an ectopic pregnancy, which needs urgent treatment, even if a test was negative.
The short version
| How late | What it usually means | What to do |
|---|---|---|
| A few days | Normal variation | Test if pregnancy is possible |
| 1 week | Often later ovulation | Test, and repeat if negative |
| 2 to 3 weeks | Worth looking for a reason | Test, think about recent changes |
| 35 days or more | A missed period | Test, and note any other symptoms |
| 2 months | Two missed periods | Test, and see a GP if you have other symptoms |
| 3 months | Three missed periods | See a GP |
Knowing your own pattern makes all of this easier. The period tracker records your cycles privately on your device, so next time you’ll know exactly what’s normal for you.