How long is a menstrual cycle – and how long does menstruation last?

The world of menstruation <3 It opens up to us with the very first bleeding and with it comes a whole host of questions:

• What exactly is a menstrual cycle?

• How long does it last?

• How many days do you bleed?

• Is it normal for it to be irregular?

Not to brag, but here at the office we have a combined 100+ years of experience with menstruation (yes, we did the math). We are in touch with you every single day on customer service, instagram - there's nothing we haven't heard about before. At the same time, we know how confusing it can be.

So let's break down the menstrual cycle – calmly, concretely, and without mystery.

What is a menstrual cycle?

A menstrual cycle as a concept covers the entire period from the first day of bleeding to the day before the next period starts. In everyday speech, most of us would probably just say "cycle", but it is one and the same thing. And it consists of more than just the bleeding itself.

A normal menstrual cycle typically lasts 21–35 days. The average is 28 days, so that's typically what you'll see mentioned.  But: 28 days is just an average – not a rule.

Some have a regular cycle, so regular that they can set their clock and plan their calendar according to it. Others experience variation from month to month.
Both can be normal.

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How many days does menstruation last?

The period itself – the days when you bleed – typically lasts 3–7 days but varies in intensity. An average period lasts about 4–5 days.
And it is completely normal that:

• The first few days are stronger

• The last days are easier

• The color changes from red to brownish

• Bleeding varies from cycle to cycle

But back to the cycle itself - menstruation is only one part of it.

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The four phases of the menstrual cycle (brief overview)

To understand the length, it makes sense to know the four phases. We have written about them in depth in the article here. - so here's a short version that just summarizes: 

1. Menstruation (approximately days 1–5)

The body expels the uterine lining.
Estrogen and progesterone are low.
Typical symptoms:

• Fatigue

• Cramps

• Bloating

• Less energy

2. Follicular phase (approximately days 1–13)

Starts at the same time as menstruation and continues until ovulation.
What happens in the body?

• Estrogen increases

• Eggs mature in the ovaries

• Energy and profit gradually increase

3. Ovulation (typically mid-cycle)

Much like the first day of your period, ovulation is a concrete milestone - a physiological "point of no return" that changes the course of your next period. During ovulation: A mature egg is released.

• Fertile window (approximately 24–48 hours)

• Some notice increased sex drive

• Some people experience ovulation pain

4. Luteal phase (approximately days 15–28)

Typically about as long as your follicular phase (but it's very individual, and you'll only know exactly what your body is like if you track your biomarkers; discharge, cervix, temperature. Progesterone rises. If the egg is not fertilized:

• Hormone levels drop

• PMS symptoms may occur

• New menstruation starts

And then it all starts again.

👉 If you want to delve into the cycle and internal seasons in more depth, read the article about the four phases of menstruation.

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Is it normal for the cycle to be irregular?

 The vast majority of us experience periods with irregular cycles, especially:

• In the first 1–2 years after first menstruation

• After pregnancy and childbirth

• The perimenopause

• Under stress

• For major lifestyle changes

It can take 1–1.5 years for a cycle to become stable after menarche (first menstruation), but you can read more about that in the article hereBut in summary: A cycle doesn't have to be 28 days to be healthy.

👉 Did you know that one of the really big bonuses of menstrual panties is that it is one of the few menstrual products that you can use before you actually bleed? So if you're unsure when your period will start: Slip on a pair of menstrual panties and you're ready.

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What affects the length of the menstrual cycle?

 There are several things that can affect your cycle length - perhaps you can nod in recognition to some of the symptoms below:

• Stress

• Sleep

• Weight loss or weight gain

• Intense training

• Hormonal contraception

• Hormonal changes

It is the variation over time that is more important than the precise number. You can read more about why your period may be delayed in the article here.

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How do you track your cycle accurately?

Apps are really popular and there are a lot of them. They are great for giving an estimated overview – but they are guessing. Each cycle is unique and cannot be calculated from an algorithm. If you want to know your cycle more precisely, you can track:

• Basal body temperature

• Changes in vaginal discharge

• Changes in the cervix

It requires a little patience – but provides great insight. Here you can go into more depth about how to use your discharge to guide you through your cycle.

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When should you react?

Are you worried about your cycle? Maybe it's behaving differently than you're used to. You should reach out to your doctor if:

• Your cycle suddenly changes significantly

• You are bleeding very heavily (read more about menorrhagia here)

• You have cycles of less than 21 or more than 35 days over a prolonged period of time

• You get your period less than 3 weeks apart

• You skip many periods without being pregnant

So if we were to start from scratch, briefly outlined:
Your body is not wrong if it doesn't follow an app - only you know your body, and that knowledge is the key to great self-understanding and insight. Next:

• A menstrual cycle typically lasts 21–35 days.

• Menstruation typically lasts 3–7 days

• 28 days is an average – not a norm

• Variation is common - just as life changes. 

Happy bleeding, as they say - take good care of yourself.

 

FAQ – Menstrual Cycle

How long is a normal menstrual cycle?

Roughly 21–35 days.

How many days do you bleed?

Typically 3–7 days.

Is it normal that my cycle is not 28 days?

Yes. 28 days is just an average. 

Can stress affect my cycle?

Yes. Stress can delay ovulation and thus lengthen the cycle.

Is it normal for my cycle to be irregular as a teenager?

Yes. It can take up to 1–2 years for it to stabilize.