1 in 3 working women will experience significant perimenopause symptoms during their peak career years. Here is what is actually happening in her body, what it costs her employer, and what can be done about it.
Let me tell you about a woman I know.
She is 46. She has been with her company for twelve years. She runs a team of eight. She is considered one of the most reliable, high-performing people in her division.
Over the past eighteen months, she has started missing deadlines. She forgets things she would never have forgotten before. She wakes at 3am, heart racing, drenched in sweat, and lies awake for two hours replaying conversations. She gets to a meeting and cannot find the word she needs — the word that used to arrive instantly. She cries on the way home and cannot explain why.
Her manager has noticed. She has noticed that her manager has noticed. She has not told anyone what is actually happening — because she does not fully understand it herself, and because the word ‘perimenopause’ in a professional setting still feels like career suicide.
This is not a single woman’s story. It is the story of somewhere between one in three and one in two working women between the ages of 40 and 55 — right now, today, inside your organisation.
What is perimenopause, and why does it hit so hard at work?
Perimenopause is the transitional phase before menopause — the years during which estrogen and progesterone begin to fluctuate and decline rapidly. It typically begins between 40 and 45, though it can start earlier or later, and it can last anywhere from two to fourteen years.
The symptoms it produces are not minor inconveniences. They are the result of estrogen and progesterone — two of the most powerful hormones in the female body — behaving unpredictably after decades of relative stability. And those hormones do not just regulate reproduction. They regulate brain function, mood, sleep, body temperature, metabolism, memory, and the nervous system.
This is why a perimenopausal woman is not ‘a bit hormonal’. She is navigating a neurological, metabolic, and physiological upheaval while trying to raise a family, run her team, hit her targets, and not let anyone see her sweat — literally.
The symptoms that are costing your organisation
The most commonly reported perimenopause symptoms — and their workplace impacts — include:
- Brain fog and memory lapses: estrogen is directly involved in synaptic function and memory consolidation. As it fluctuates, so does cognitive clarity. This is not stress, laziness or disengagement — it is a hormonal reality. Dr. Lisa Mosconi’s research at Weill Cornell shows measurable changes in brain glucose metabolism during the perimenopausal transition.
- Sleep disruption: night sweats and early waking are among the most common perimenopause symptoms. A woman who has slept three to five broken hours is not performing at her best — and this is not a lifestyle choice. Sleep deprivation impairs decision-making, emotional regulation, and sustained attention.
- Mood changes and anxiety: progesterone has a calming, anti-anxiety effect on the brain. As progesterone declines, anxiety increases. This is not a psychological failing. It is chemistry.
- Hot flushes at work: the visible, impossible-to-ignore symptom that most women go to great lengths to conceal. The effort of concealment — the hypervigilance, the planning, the shame — is itself exhausting.
- Joint pain and fatigue: estrogen is anti-inflammatory. As it declines, inflammation increases. Chronic fatigue and joint discomfort are real physical symptoms, not motivational deficits.
The numbers that matter to the person approving the budget
If you are reading this as a business leader or HR director, these numbers are for you:
- The Mayo Clinic estimates menopause-related productivity losses at $1.8 billion in lost working time per year in the US alone — rising to $26.6 billion when medical expenses are included.
- 40% of women report that hormonal symptoms interfere with their job performance. Presenteeism — being physically present but cognitively absent — costs employers 10 times more than absenteeism.
- 1 in 5 women experiencing menopause symptoms has considered leaving their job because of a lack of support. These are your most experienced women — the ones who have been in your organisation longest, who hold the institutional knowledge, who are in or approaching leadership roles.
- 72% of women are hiding their symptoms at work (Catalyst Global Survey, 2024). This means the problem is invisible in your data — but not in your output.
- A Stanford SIEPR study (2025) found that women who seek medical help for menopause symptoms are earning 10% less four years later — because symptoms, left unmanaged, force them to reduce hours or exit the workforce entirely.
The women at greatest risk are your most valuable: mid-career, in or approaching leadership, with 10 to 20 years of organisational knowledge. Losing them — to early exit, to reduced hours, to quiet disengagement — is one of the most expensive and least visible talent crises in corporate South Africa today.
What actually helps
The evidence is clear: education and awareness reduce the economic cost of menopause. A Stanford study found that providing women with information about menopause and better access to support directly lowers the earnings losses associated with the transition.
This does not require a complete wellness overhaul. It requires three hours of the right education, delivered to the right people, by someone who has lived it and studied it and knows how to translate it into something every working woman can use immediately.
That is what Lunar Living does.
It does not medicalise perimenopause. It does not position it as a crisis. It teaches women what is happening in their bodies, why, and what they can do — today, this week, with their next meal and their next work schedule — to work with their hormonal reality instead of against it.
The woman I described at the beginning of this article? She does not need to be managed out or pitied. She needs to be given the knowledge that no one ever gave her.
→ See what the Lunar Living workshop covers
→ Cortisol, stress and the working woman
