Quick answer
What could missed period mean?
A missed period is often caused by pregnancy, stress, significant weight change, polycystic ovary syndrome (PCOS) or thyroid disease. Take a pregnancy test first if you are sexually active, as pregnancy is the most common cause. See a GP if you have missed three periods in a row, which is known as amenorrhoea.
Understanding a missed period
A single missed period is common and is often nothing to worry about. A prolonged absence of periods, however, needs investigation to find the cause.
Common causes of a missed period
Pregnancy, polycystic ovary syndrome (PCOS), thyroid disease and stress are among the most common causes of a missed period. Contraception can also alter your bleeding pattern, so a missed bleed while using contraception is not always significant.
What to do about a missed period
Take a pregnancy test first if there is any chance you could be pregnant. It also helps to track your cycles, because a record of your periods gives your GP useful information if you need an assessment.
When to see a GP about missed periods
See a GP if your periods have been absent for three months, which is known as amenorrhoea, or if you have concerns about your fertility. Your GP may arrange blood tests and an ultrasound scan as needed to find the cause.
Common questions about missed period
- How late can a period be and still be normal?
- A period that is up to a week late can be entirely normal. If there is any chance you could be pregnant, take a pregnancy test to rule this out.
- Can stress stop your periods?
- Yes, significant stress can disrupt ovulation and stop your periods. A major change in weight can have the same effect on the menstrual cycle.
- What is PCOS and how is it diagnosed?
- Polycystic ovary syndrome (PCOS) is a condition that causes irregular periods, acne and excess hair growth. It is diagnosed using blood tests and an ultrasound scan.
- Is it normal to have no bleed while on the pill?
- Yes, having no bleed is often normal on continuous or low-dose pills. Mention it at your contraception reviews so it can be checked if needed.