Hormonal health
Early menopause linked to increased dementia risk

Women who enter menopause earlier in life face a higher risk of dementia, while hormone replacement therapy (HRT) appears to lower that risk, new research suggests.
The study of 1,329 cognitively healthy women also found that greater exposure to oestrogen across the reproductive lifespan was associated with better cognitive performance and larger brain volumes.
Women have a higher risk of dementia than men, accounting for almost two-thirds of those living with Alzheimer’s disease — the most common form of dementia that affects memory and thinking skills.
Researchers from the University of Galway and Boston University carried out the study using data from the Framingham Heart Study — the world’s longest-running longitudinal cohort study — to analyse the association between reproductive factors and markers of brain ageing.
They examined the age at first period, age at menopause, duration of reproductive lifespan, blood oestrogen levels, and whether participants used post-menopausal hormone replacement therapy.
These were then compared with results from cognitive tests, MRI scans showing signs of brain shrinkage, and future dementia risk.
Having more children, higher oestrogen levels and later menopause were all linked to stronger cognitive performance, particularly in visuospatial skills — the ability to perceive, analyse and mentally process visual and spatial information.
Professor Emer McGrath is lead author and associate professor in medicine at the College of Medicine, Nursing & Health Sciences, University of Galway, and consultant neurologist at Galway University Hospital.
The researcher said: “Our study explored the association between reproductive and hormonal factors across a woman’s lifespan and risk of brain ageing.
“We looked at neurocognitive and neuroimaging markers from MRI brain scans, as well as cognitive test performance, including tests of memory, reasoning skills and visuospatial skills.
“We also looked at the future risk of dementia in relation to these reproductive factors.
“We found that entering menopause at an earlier age appears to be associated with an increased risk of dementia, while post-menopause hormone replacement therapy appears to be associated with a lower risk.
“Although our results suggest positive cognitive benefits of greater lifetime oestrogen exposure, they do require further validation.”
The research also found that having more children was associated with larger brain volumes, including in regions typically showing shrinkage in Alzheimer’s disease.
Menopause
High street bakery chain Gail’s reveals menopause plan

Gail’s has unveiled a menopause action plan offering new workplace support to thousands of staff ahead of legal reforms due in 2027.
The high street bakery chain will offer new benefits including 24/7 digital GP access and a new employee assistance programme, according to The Times.
It will also explore new online training for staff, including specific training for management.
Gail’s people director Miranda Burgum told The Times: “All we’re trying to do is talk freely and for it not to be a forbidden subject. It’s helping our managers and teams understand that this isn’t a taboo.”
“We’re going to develop the education with our managers, so it will be threaded through all our policies
“It will look at induction training, it will look at the types of people we need to make sure that we make reasonable adjustments for.
“And if somebody needs some sort of risk assessment, we’re going to be looking at [that].”
The move comes ahead of reforms due to be introduced in spring 2027 under the Employment Rights Act.
UK employers with 250 or more employees will be legally required to publish and update official menopause action plans.
The plans are intended to support employers to take effective action to improve workplace gender equality and support employees experiencing menopause.
Menopause
Menopause hormone therapy may improve cardiovascular health outcomes, study suggests

Hormone therapy started in peri- or early post-menopause was linked to a 22 per cent lower risk of cardiovascular events in women with vasomotor symptoms in a recent study.
The findings came from an observational analysis of 20 years of health data and do not show that hormone therapy caused the reduction in cardiovascular risk.
The association was strongest among Black women and women who started treatment within 10 years of menopause onset, although researchers cautioned that the findings should not guide clinical practice.
The study is the first of its kind in the US to assess the risk of future cardiovascular events among women with vasomotor symptoms who use hormone therapy during peri- and early postmenopause.
Samar R. El Khoudary, professor and chair of the Department of Epidemiology at the VCU School of Public Health and one of the study’s senior researchers, said: “The menopause transition represents a critical window for understanding how hormone therapy may relate to cardiovascular disease risk. Our findings suggest that timing of initiation may influence cardiovascular outcomes.”
The researchers stressed that the findings do not support using hormone therapy to prevent cardiovascular disease.
Potential benefits must also be weighed against risks, including the increased breast cancer risk observed with longer-term use.
The study was not a randomised controlled trial, the gold-standard method for testing biomedical treatments.
Rebecca C. Thurston, associate dean for Women’s Health Research at the University of Pittsburgh School of Medicine and one of the study’s senior researchers, said: “These findings point to women with vasomotor symptoms as those who may show cardiovascular benefit from hormone therapy initiated during the perimenopause and postmenopausal years.
“However, conclusions should be tempered by the observational nature of the study, and findings should not guide clinical practice.”
Vasomotor symptoms, meaning hot flushes and night sweats, affect up to 80 per cent of women during the menopause transition and last for an average of seven to ten years.
Their frequency and severity build through perimenopause and typically peak in early postmenopause.
Hormone therapy replaces oestrogen and progesterone that women’s bodies stop producing after menopause and is currently the most effective treatment for these symptoms.
Clinical trials led by the Women’s Health Initiative in the early 2000s raised concerns about hormone therapy’s impact on heart disease, stroke, breast cancer and other risks, leading to years of reluctance among patients and providers to use the treatment.
El Khoudary said: “Hot flashes and night sweats have a significant impact on a woman’s quality of life and ability to work productively.
“While hormone therapy is an effective treatment for these symptoms, questions have remained about its cardiovascular effects, particularly the importance of when treatment is initiated during the menopause transition.”
More recent research suggests the effects of hormone therapy on the heart and vascular system may vary by age and treatment timing, with women younger than 60 who start treatment closer to menopause onset having different levels of risk.
In 2026, the US Food and Drug Administration removed “black box” warnings from hormone therapy products, reflecting evolving evidence on the benefits and risks of treatment.
Researchers from Virginia Commonwealth University and the University of Pittsburgh analysed data from more than 2,700 women taking part in the Study of Women’s Health Across the Nation (SWAN).
The women reported vasomotor symptoms and had not previously experienced cardiovascular events.
Clinical data collected between 1997 and 2017 were used to examine whether women who started hormone therapy for vasomotor symptoms were more or less likely to experience stroke, congestive heart failure, heart attack or revascularisation procedures than women who did not start treatment.
El Khoudary said: “By using data from the SWAN study, we essentially were able to emulate a series of hypothetical clinical trials to gain a deeper understanding into how hormone therapy taken to mitigate vasomotor symptoms during peri- and early postmenopause influences cardiovascular risk over time.
“It allowed us to examine clinically meaningful cardiovascular disease events over long-term follow-up in a population and treatment window that has been challenging to study prospectively.”
Starting hormone therapy during peri- or early postmenopause was associated with an estimated 22 per cent lower risk of cardiovascular disease events.
Women who began hormone therapy within 10 years of menopause onset had an estimated 27 per cent lower risk compared with women who did not start treatment.
Among Black women, starting therapy during peri- or early postmenopause was associated with an estimated 49 per cent lower risk of cardiovascular disease events.
No clear reduction was seen among women who started therapy more than 10 years after menopause onset or among White women and other racial and ethnic groups.
El Khoudary said: “The differences in cardiovascular outcomes by race and ethnicity are notable, particularly because Black women are more likely to experience severe vasomotor symptoms.
“These findings highlight the need to better understand how hormone therapy timing may influence cardiovascular outcomes across diverse populations.”
It remains unclear why cardiovascular risk differed according to when hormone therapy was started, although researchers believe differences in blood vessel health with age may play a role.
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