Originally written by ZRT Laboratory author. Reproduced with permission. Last reviewed: May 2026.
Menopause is often thought of as something that happens in a woman's early fifties — a gradual transition marked by irregular periods and familiar symptoms. But for a significant number of women, menopause arrives far earlier than expected, sometimes decades ahead of schedule. Early menopause and surgical menopause present unique challenges that are frequently underrecognised, undertreated, and profoundly misunderstood.
This article combines a first-person account of early and surgical menopause with a clinical overview of what causes it, the health risks it carries, and why comprehensive hormone testing is essential for finding the right path forward.
A Personal Experience of Early Menopause
In my early forties, after two pregnancies in my mid-to-late thirties, I began experiencing irregular periods, difficulty sleeping, hot flushes, and night sweats. I attributed these symptoms to the stress of an international move with young children. When I finally saw a doctor, an FSH blood test confirmed what I had not expected: I was in menopause at age 42.
When I mentioned this to family members, I discovered that early menopause had affected my aunts as well — something nobody had ever discussed. Early menopause, it turns out, runs in families.
Some years later, a diagnosis of an ovarian growth led to a bilateral oophorectomy — surgical removal of both ovaries — which brought about surgical menopause on top of my already early natural menopause. The growth was benign, but the surgery had an unforeseen consequence: my testosterone levels dropped to undetectable levels almost overnight.
The experience of having virtually no oestrogen and no testosterone simultaneously is difficult to describe. It is not simply a matter of hot flushes and poor sleep. It affects vitality, mood, libido, cognitive clarity, and the fundamental sense of wellbeing in ways that are hard to convey to someone who has not experienced it. Finding the right hormone support — and the right clinician to guide it — took time, research, and persistence.
What Is Early Menopause?
Menopause is clinically defined as the cessation of periods for twelve consecutive months, accompanied by elevated FSH levels. It typically occurs in a woman's early fifties. However, two distinct earlier presentations exist:
Premature Ovarian Insufficiency (POI)
Premature ovarian insufficiency — previously called premature ovarian failure — refers to the loss of normal ovarian function before the age of 40. It affects approximately 1% of women and is characterised by irregular or absent periods, elevated FSH, and low oestrogen. Unlike natural menopause, POI does not always mean permanent infertility; ovarian function can fluctuate, and spontaneous pregnancy is occasionally possible.
Early Menopause (Ages 40–45)
Spontaneous early menopause affects approximately 5% of women aged 40 to 45. It can result from a family history of early menopause, autoimmune conditions, chromosomal abnormalities, a history of smoking, or certain infections such as mumps. In many cases, as in my own, the cause is genetic — a family pattern that often goes unrecognised until it happens.
A population-based study found that 37% of women who entered menopause before age 46 had a mother, sister, aunt, or grandmother who had also experienced early menopause, compared with only 9% of women who entered menopause after age 46. If early menopause runs in your family, it is worth discussing this with your GP and considering proactive hormone monitoring from your late thirties onwards.
Surgical Menopause
Surgical menopause occurs when both ovaries are removed (bilateral oophorectomy), regardless of age. Unlike natural menopause, which unfolds gradually over months or years, surgical menopause is immediate — hormone levels drop sharply within days of surgery. This abrupt transition is often more severe in its symptom presentation than natural menopause and carries a higher risk of long-term health consequences if left untreated.
Surgical menopause can also be induced by chemotherapy or radiation therapy, which may temporarily or permanently impair ovarian function.
Health Risks of Early and Surgical Menopause
The health consequences of early menopause extend well beyond menopausal symptoms. They reflect the long-term impact of oestrogen deficiency on multiple body systems — consequences that are more significant the earlier menopause occurs, because the period of oestrogen deprivation is longer.
Cardiovascular Disease
Oestrogen plays a protective role in cardiovascular health by supporting healthy cholesterol levels, arterial flexibility, and endothelial function. Women who experience early menopause have a significantly higher lifetime risk of cardiovascular disease than those who enter menopause at the typical age. This risk is further elevated in surgical menopause, where the loss of oestrogen is abrupt rather than gradual.
Osteoporosis and Bone Loss
Oestrogen is essential for maintaining bone density. Early menopause accelerates bone loss and substantially increases the risk of osteoporosis and fragility fractures later in life. Women with early or surgical menopause should have baseline bone density assessment (DEXA scan) and regular monitoring.
Cognitive Health and Dementia Risk
Oestrogen supports neurological function, and its early loss has been associated with increased risk of cognitive decline and dementia. The timing of hormone replacement therapy appears to matter significantly: evidence from the Kronos Early Estrogen Prevention Study (KEEPS) and other trials suggests that starting hormone therapy soon after the onset of menopause — rather than years later — is associated with better cognitive and cardiovascular outcomes.
Mood, Sleep, and Mental Health
Oestrogen influences serotonin, dopamine, and GABA signalling in the brain. Its loss can contribute to depression, anxiety, irritability, poor sleep, and brain fog. These symptoms are frequently attributed to stress or other causes, delaying appropriate hormonal assessment and treatment.
The Role of Testosterone in Women After Menopause
Testosterone is not exclusively a male hormone. Women produce testosterone in the ovaries and adrenal glands, and it plays an important role in libido, energy, mood, bone density, muscle maintenance, and cardiovascular health. In natural menopause, the ovaries continue to produce some testosterone even after oestrogen production ceases — providing a degree of ongoing hormonal support.
In surgical menopause, however, the removal of both ovaries eliminates this testosterone production almost entirely. The result is a combined deficiency of oestrogen and testosterone that is more severe than natural menopause in its impact on wellbeing, libido, and long-term health.
Despite this, testosterone therapy in women remains underutilised and under-researched. Clinical evidence supports its use for low libido in postmenopausal women, and many clinicians with expertise in women's hormonal health report broader benefits including improved energy, mood, and cognitive function. If you have undergone surgical menopause or suspect low testosterone, it is worth requesting specific testosterone testing alongside your standard hormone panel.
Our Advanced Female Saliva Hormone Profile measures oestradiol, progesterone, testosterone, DHEA, and cortisol using LCMS-validated saliva testing — providing the comprehensive hormonal picture needed to guide personalised treatment decisions.
The Importance of Hormone Replacement Therapy in Early Menopause
The evidence base for hormone replacement therapy (HRT) in early and surgical menopause is considerably stronger than for HRT initiated in later life. The Women's Health Initiative — the study most frequently cited in discussions of HRT risk — enrolled women who were, on average, more than a decade past menopause. Its findings are not directly applicable to women who begin HRT soon after early or surgical menopause.
Current guidance from major menopause societies recommends that women with early menopause or POI use HRT at least until the average age of natural menopause (around 51), to protect cardiovascular, skeletal, and neurological health. The risks of not treating early menopause are generally considered to outweigh the risks of appropriately managed HRT in this population.
Finding a clinician who understands the nuances of early and surgical menopause — and who can interpret comprehensive hormone testing to guide individualised therapy — is one of the most important steps a woman in this situation can take.
Our Advanced Female Wellness Test provides a detailed assessment of oestrogen, progesterone, testosterone, DHEA, cortisol, thyroid markers, and toxic elements — with a specialist doctor's report included to help you and your clinician interpret results and plan appropriate treatment.
Finding the Right Support
Navigating early or surgical menopause can feel isolating, particularly when symptoms are dismissed or misattributed. Arriving at appointments with a clear understanding of your hormone status — supported by comprehensive testing — empowers you to have more informed conversations with your healthcare provider and advocate effectively for appropriate treatment.
Not all hormone tests are equal. A single FSH measurement, while useful for confirming menopause, tells you nothing about oestrogen, progesterone, testosterone, or adrenal function. A comprehensive panel, tested at the right time and interpreted by someone with genuine expertise in women's hormonal health, provides the foundation for effective, personalised hormone restoration.
Our Comprehensive Female Saliva Hormone Profile offers an accessible starting point for women who want to understand their full hormonal picture — measuring eight key hormones using LCMS-validated saliva analysis for clinical-grade accuracy at home.
Frequently Asked Questions
What is the difference between premature ovarian insufficiency and early menopause?
Premature ovarian insufficiency (POI) refers to loss of normal ovarian function before age 40 and does not always mean permanent infertility — ovarian function can fluctuate. Early menopause refers to menopause occurring between ages 40 and 45 and is generally permanent. Both involve low oestrogen and elevated FSH, and both carry similar long-term health risks.
Does early menopause run in families?
Yes. Research shows that 37% of women who experience early menopause have a close female relative who also experienced it, compared with only 9% of women who enter menopause at the typical age. If your mother, sister, or aunt experienced early menopause, it is worth discussing proactive hormone monitoring with your GP from your late thirties.
What are the long-term health risks of early menopause?
Early menopause is associated with increased risks of cardiovascular disease, osteoporosis, cognitive decline, and premature mortality if left untreated. These risks reflect the longer period of oestrogen deficiency compared with women who enter menopause at the typical age. HRT initiated promptly after early menopause significantly reduces these risks.
Is testosterone important for women after menopause?
Yes. Testosterone supports libido, energy, mood, bone density, muscle mass, and cardiovascular health in women. In natural menopause, the ovaries continue producing some testosterone. In surgical menopause, testosterone production is eliminated almost entirely, making combined oestrogen and testosterone deficiency a significant concern that requires specific assessment and treatment.
When should HRT be started after early menopause?
Current guidance recommends starting HRT as soon as possible after the diagnosis of early menopause or POI, and continuing at least until the average age of natural menopause (around 51). Early initiation is associated with better cardiovascular, skeletal, and cognitive outcomes. The risks of untreated early menopause generally outweigh the risks of appropriately managed HRT in this population.
How is early menopause diagnosed?
Early menopause is typically confirmed by a combination of symptoms (irregular or absent periods, hot flushes, night sweats, sleep disturbance), elevated FSH levels on two separate blood tests taken at least four weeks apart, and low oestradiol. A comprehensive hormone panel — including oestrogen, progesterone, testosterone, DHEA, and FSH — provides a more complete picture than FSH alone and is essential for guiding treatment.
Originally written by ZRT Laboratory author. Reproduced with permission. Last reviewed: May 2026.