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First periods

If periods have only just started, irregular is normal

The first few years

Most girls have their first period around the age of 12, but they can start from 8. Being irregular early on is normal — the body needs a few months for its pattern to settle. Once it has, the NHS gives a range of 23 to 35 days for these years, with 2 to 7 days of bleeding. The adult range is a little wider, at 21 to 35 days.

What helps

  1. 1

    Log a few months first. Two or three cycles can't tell you what your pattern is.

  2. 2

    Always have a spare. A pad in your bag or backpack, even when you're not expecting it.

  3. 3

    Tell someone. Your mother, a sister, a friend, or the school nurse. There's no shame in asking, and the answer is usually simpler than you think.

When to ask

The first two are the NHS's:

  • if periods haven't started by the age of 15
  • or by 13, if there are no other signs of puberty either
  • very heavy bleeding — soaking through a pad every 1 to 2 hours, clots, or blood through to your clothes or bedding — or pain that stops you going to school
When not to wait One short list

Sources

Health information, not medical advice, diagnosis or treatment. For your own symptoms, talk to a doctor.

Your cycle, honestly.

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