Symptoms
Why is my period late?
A late period is common, and pregnancy is only one of many possible reasons. Stress, sudden weight change, a lot of exercise, PCOS, some contraception, breastfeeding, perimenopause and thyroid problems can all delay a period. If you could be pregnant, a test is most reliable from the first day of a missed period.
What are the common reasons for a late period?
The NHS lists these common reasons:
- Stress.
- Sudden weight loss, being overweight, or a lot of exercise.
- PCOS.
- Some contraception: the combined pill, the injection or the hormonal coil (IUS).
- Breastfeeding.
- Perimenopause, usually from 45 to 55.
- Some conditions, like thyroid problems or diabetes.
When should I take a pregnancy test?
A pregnancy test is most reliable from the first day of a missed period. If you don’t know when it was due, test at least 21 days after unprotected sex. Any time of day is fine.
A positive result is almost always right. A negative is less reliable: if your period still hasn’t come, test again a few days later, and see a doctor if the second one is negative too.
When is a missed period an emergency?
If you’ve missed a period and have unusual bleeding and pain anywhere in your tummy, the NHS says to get an urgent appointment (111 in the UK). It can be a sign of an ectopic pregnancy, which needs checking quickly.
When should I see a doctor about a missed period?
See a doctor if:
- You’ve missed 3 periods in a row.
- Your periods have become irregular.
- A missed period comes with weight changes, tiredness, new facial hair, or dry or oily skin.
- Your periods haven’t started by 15.
Frequently asked questions
How late can a period be before I worry?
The NHS suggests seeing a doctor if you’ve missed 3 periods in a row, if your periods have become irregular, or if you haven’t started by 15.
Can I be pregnant if a test is negative?
A positive result is almost always right, but a negative is less reliable. If your period still hasn’t come, test again a few days later, and see a doctor if the second one is negative too.
Can stress delay a period?
Yes. Stress is one of the common causes the NHS lists, along with big weight changes and a lot of exercise.
Sources
Seventh is a free period and cycle tracker for iPhone and iPad, by doogud. This article is general information, not medical advice. If something feels wrong, see a doctor.
