Are your symptoms actually perimenopause?

Perimenopause is the transition phase leading up to the final menstrual period. According to the STRAW+10 staging system (Harlow et al. 2012), it begins with early perimenopause (stage -2), characterised by persistent changes in cycle length, and progresses to late perimenopause (stage -1), characterised by intervals of 60 or more days without a period. The total duration of perimenopause varies widely, typically 2 to 8 years. Menopause itself is defined as 12 consecutive months without a period, with a median age of 51.4 years in Western populations.

NHS and British Menopause Society guidance states that blood tests (including FSH levels) are not recommended as a routine diagnostic test for perimenopause in women over 45. FSH levels fluctuate considerably during the transition and a single measurement can be misleading. Diagnosis in this age group is primarily clinical, based on symptom pattern and menstrual history. Blood tests may be useful in women under 45 where premature ovarian insufficiency is suspected.

Hormonal contraception (the pill, patch, hormonal coil and implant) can mask the natural menstrual changes that signal perimenopause, and may suppress vasomotor symptoms. Your MRS score still reflects your symptom burden, but the period status inputs will not accurately reflect your underlying hormonal status. Discuss transitioning off hormonal contraception with your GP if you want a clearer picture of your menopausal stage.

The Study of Women's Health Across the Nation (SWAN) found that the median age of onset for perimenopause is approximately 47.5 years. However, the range is wide: some women begin experiencing symptoms as early as their late 30s or early 40s, while others do not notice changes until their mid-50s. Ethnicity, body mass index, smoking status, and family history all influence timing. Women who smoke tend to enter perimenopause 1-2 years earlier than non-smokers. The most common reason women do not recognise perimenopause when it starts is that they believe they are "too young" for it. Source: SWAN Study; Harlow et al. (2012), STRAW+10.

Duration varies considerably. The SWAN study found that the median total duration of the menopausal transition is approximately 4-8 years, but some women experience symptoms for a decade or longer. Vasomotor symptoms (hot flushes and night sweats) persist for a median of 7.4 years according to SWAN data, with duration varying by ethnicity: Black women experience the longest median duration at approximately 10 years. The unpredictability of the timeline is one of the most frustrating aspects for women going through it. Source: Harlow et al. (2012); SWAN longitudinal data.

Your total MRS score is a snapshot of your current symptom burden across 11 domains. It does not diagnose perimenopause, confirm your hormonal status, or predict how long your symptoms will last. What it does is quantify severity in a standardised way so you can track changes over time and communicate clearly with your clinician. A score in the moderate or severe range means your symptoms are affecting your quality of life at a level that clinical research associates with benefit from intervention, whether that is HRT, targeted supplements, cognitive behavioural therapy for menopausal symptoms, or lifestyle changes. Source: Heinemann et al. (2004).

Perimenopause is the transitional phase during which the ovaries gradually produce less oestrogen, leading to changes in menstrual cycles and the emergence of symptoms. It is not the same as menopause, which is a single point in time defined retrospectively as 12 consecutive months without a menstrual period. The average age of menopause is 51.4 years, but perimenopause can begin 4-10 years earlier. During perimenopause, hormone levels fluctuate unpredictably rather than declining in a straight line, which is why symptoms can come and go unpredictably. Source: SWAN Study; NHS Menopause overview.

You should speak to your GP or a menopause specialist if your symptoms are significantly affecting your quality of life, if you experience symptoms before age 40 (early menopause affects about 1% of women), if you have sudden onset of severe symptoms, or if you have concerns about whether your symptoms might have another cause. Effective treatments, including hormone replacement therapy (HRT), are available for perimenopause and have been shown in recent research to have a broadly favourable benefit-risk profile for most women under 60. The British Menopause Society (UK) and The Menopause Society (US) both maintain specialist directories. Source: BMS clinical guidelines; NHS Menopause overview.

Yes. Hot flushes (vasomotor symptoms) are the hallmark symptom of perimenopause and menopause, affecting 55-75% of women in the 45-55 age group according to SWAN data. They are caused by declining oestrogen levels disrupting the hypothalamus's ability to regulate body temperature. For most women, hot flushes are most intense in the year before and after the final period, then gradually reduce over several years. However, a substantial minority of women experience them for 10+ years. Effective treatments include HRT, non-hormonal prescription options (like fezolinetant), and some evidence-based supplements. Source: SWAN Study.