Perimenopausia: qué es, síntomas, edad de inicio y cómo identificarla

12 May 2026

Perimenopause: what it is, symptoms, age of onset, and how to identify it

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Are you noticing changes in your cycle, your energy, or your sleep and don't know why? The perimenopause could be the cause. It is a natural, yet rarely explained stage that can raise many questions.

In this clear, evidence-based guide, you will understand What is perimenopause, when does it start, what are its symptoms, and what options are available to manage it better?.

What is perimenopause and why understanding this stage matters

What is perimenopause?

The perimenopause is the transitional stage leading up to menopause. During this period, ovarian function begins to become irregular and hormones fluctuate.

This can cause changes in your menstrual cycle and in other aspects of your body.

Although it is often only associated with hot flashes or irregular periods physical, emotional, and metabolic changes.

What happens in the body during perimenopause?

Qué es la perimenopausia y qué cambios hormonales se experimenta

Perimenopause is part of natural reproductive aging. As menopause approaches:

The production of estrogen and progesterone fluctuate
Menstrual cycles become less predictable
Physical and emotional symptoms appear

These hormonal changes explain why symptoms such as the following may appear:

Hot flashes
Night sweats
Sleep disturbances
Mood swings

It is not a disease: it is part of natural reproductive aging.

Differences between perimenopause and menopause

It is important to clearly distinguish between perimenopause and menopause, because they are sometimes used as synonyms when they are not:

Appearance	Perimenopause	Menopause
Definition	Previous transition with irregular cycles	Absence of menstruation for 12 consecutive months
Typical age	Between 40 and 50 years old	En torno a los 51 años de media
Hormones	Fluctuating estrogen and progesterone	Low and stable levels
Possibility of pregnancy	Yes, as long as there is ovulation	No
Duration	From 4 to 10 years, progressively	Fixed point followed by postmenopause

Perimenopause: at what age does it start

The perimenopause usually begins between the ages of 40 and 50, although it may be brought forward in some cases.

There is no exact age, but many women begin to notice changes in their cycle several years before menopause. A shorter period, a week of increased irritability, or a couple of nights with hot flashes can be early signs.

Perimenopause symptoms

Síntomas que se experimentan en la perimenopausia: insomnio y sofocos nocturnos

Perimenopause symptoms vary widely from one woman to another. Some barely notice any changes, while others feel their body starting to behave differently from one month to the next.

Among the symptoms most common appear:

• irregular periods (shorter, longer, or missed cycles)

• hot flashes y sudores nocturnos

• difficulty falling or staying asleep

• irritability and mood swings

• vaginal dryness

• fatigue or a feeling of brain fog

• changes in the body composition

You do not need to experience all the symptoms to be in this stage. Often, the first warning sign is a change in your cycle, and the rest appears progressively.

Is it normal to feel this way during perimenopause?

completamente natural, not a disease. However, just because it is normal does not mean you have to resign yourself to feeling bad.

Si los síntomas:

They affect your rest
They alter your mood
They interfere with your day-to-day life

It is convenient evaluate support options. The key is to distinguish between what is to be expected and what is already affecting quality of life.

Options to support perimenopause

This is where many women start looking for solutions, and it makes sense: perimenopause isn't always easy to manage with patience alone. There are several layers of support that complement each other.

Lifestyle habits

Son la base de todo:

Sleep well
Maintain regular physical activity
Eating healthy
Reduce factors that worsen symptoms

Small, sustained improvements, maintained over time, they help more than it seems.

Menopause supplements: what the evidence says

Cuando hablamos de menopause supplements, it is best to place them in the correct spot: they are a support.

Some examples:

Creatine: it is beginning to be studied in the context of women's health, although specific evidence for this stage is still limited.
Omega-3: shows variable results based on the evaluated symptom.
Magnesium, vitamin D, and calcium: they are usually assessed based on levels, specific needs, and individual context.

ajustar según el contexto de cada persona.

Medical support

professional support can make all the difference.

There are effective medical options especially for:

Intense hot flashes
Sleep problems
Significant emotional changes

Perimenopause and exercise: how to adapt your routine

Entrenamiento de fuerza en mujer durante la perimenopausia

In active women or those who train regularly, perimenopause is especially noticeable in:

The recovery
The energy level
The rest

Some useful tips

Keep the strength training
Adjust the load according to fatigue
Prioritize the rest
Prioritize nutrition and hydration to promote recovery

Perimenopause and hormonal wellness: how we understand it at IVB

At IVB Wellness Lab, we understand perimenopause as a stage that deserves to be well explained. Not only because of the hormonal changes, but also because it can influence:

The rest
The mood
Body composition
How you feel about yourself

Talking about perimenopause with informed judgment matters. When do you understand what is happening to you, you stop experiencing it as chaos and start seeing it for what it is: a real, common, and manageable biological transition. Perimenopause is not the end of anything. It is a stage that deserves attention and support.