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What ordinary looks like, and how wide the range is

Start here if you have never been told what counts as normal, only that yours is not.

Lesson 1 of 5

10 min Text

What this lesson says

  • Cycle lengths between about 21 and 35 days are all within the usual range
  • Bleeding for anywhere between two and seven days is common
  • A cycle that varies by a few days month to month is ordinary, not a warning
  • What matters clinically is usually a CHANGE from your own pattern, not a number in a book
  • The first couple of years after periods begin, and the years approaching menopause, are irregular by nature

This is general education. It is not advice about your own situation, and it does not replace seeing a clinician.

Written lesson.
  1. 1. Most of what women are told about periods is a single number: twenty-eight days. It is an average, not a standard, and treating it as a standard is why a great many people believe something is wrong with them when nothing is. Cycle lengths anywhere between about twenty-one and thirty-five days sit inside the usual range, and bleeding for two to seven days is common.
  2. 2. Variation is also ordinary. A cycle that is twenty-six days one month and thirty the next is not a warning sign; bodies are not clocks, and illness, travel, a hard few weeks and a change in weight all nudge it.
  3. 3. What a clinician is usually more interested in is a change from your own pattern. Periods that were regular and have stopped being so, bleeding that has become much heavier than it used to be, pain that has become worse than it was, or gaps that have grown much longer — those are worth raising, and they are worth raising sooner if the change arrived quickly.
  4. 4. Two stretches of life are irregular by nature and are usually left alone. The first year or two after periods begin, when the cycle is still settling, and the years approaching menopause, when it is unsettling again. Irregularity in those windows is expected, which is not the same as saying it should never be checked.
  5. 5. The rest of this course is about the other end: bleeding that is heavy enough to shape your week. It is one of the commonest reasons women see a gynaecologist, it has several ordinary explanations, and most of them have something that can be done about them.

All lessons in this course

  1. 1 What ordinary looks like, and how wide the range is 10 min Reading now
  2. 2 What counts as heavy, when nobody can measure it 10 min
  3. 3 What is usually behind heavy or painful bleeding 12 min
  4. 4 What gets checked, and why iron is in the first set of tests 11 min
  5. 5 What treatment is aimed at, and questions for your clinician 10 min

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