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News
‘Devastating’ fault at London clinic may have damaged eggs of more than 100 women
Patients have only recently been told their eggs and embryos may not survive the thawing process if they were frozen with the faulty solution

More than 100 women who had their eggs frozen at a leading NHS clinic have been told that they may have been damaged due to a fault in the freezing process.
The assisted conception unit at Guy’s hospital in London said it may have inadvertently used some bottles of a faulty freezing solution in September and October 2022. However, it said it did not know the liquid was defective at the time.
Many of the 136 women affected have subsequently had cancer treatment since having their eggs or embryos frozen, which may have left them infertile, The Times reported.
The patients have only recently been told their eggs and embryos may not survive the thawing process if they were frozen with the faulty solution.
The fertility regulator, the Human Fertilisation and Embryology Authority (HFEA), is investigating.
It said a safety notice about the faulty freezing solution was issued by the authority to all clinics in February last year. However, this was several months after bottles from a faulty batch were used at Guy’s hospital’s assisted conception unit.
HFEA described the investigation at Guy’s hospital as “ongoing”, adding that it would take “any further action required”.
The regulator said that faulty egg-freezing products had also affected Jessop Fertility in Sheffield, but it said it was satisfied that Jessop “undertook a thorough investigation when they first became aware of the issue and contacted and supported any patient affected”.
“The HFEA can confirm that this issue is limited to two clinics in the UK: Guy’s and St Thomas’ Assisted Conception Unit, London and Jessop Fertility, Sheffield,” said Rachel Cutting, director of compliance and information at the HFEA, in a statement.
“Our ongoing investigation only relates to Guy’s as we are satisfied that Jessop’s undertook a thorough investigation when they first became aware of the issue and contacted and supported any patient affected.
“The company supplying the product directly to clinics will know exactly where it’s gone through their traceability processes. The company is also obliged to report any problems to the MHRA.”
“Any patients likely to have been affected will have been notified by their clinic. We hope this provides reassurance to anyone concerned.
“Fertility treatment in the UK is generally very safe. Our most recent report shows that out of the almost 100,000 treatment and storage cycles which took place in 2022/23, more than 99 per cent were conducted without any incidents occurring.”
Dr Piraye Yurttas Beim, researcher in molecular biology and embryology and founder of Celmatix, told Femtech World: “This is a reminder that the safest place for a woman’s eggs is in her own ovaries and not a freezer.
“Women lose their ovaries far too frequently due to a lack of diagnostics that would allow earlier detection of ovarian cancer and also due to ovarian damage from chemotherapy.
“Creating a new standard of care that protects ovarian function for women undergoing cancer treatment is a big focus for us at Celmatix. These stories are both heartbreaking and also a reminder of why we come to work everyday.”
Dr Cristina Hickman, a consultant clinical embryologist, lecturer at Imperial College London and co-founder of Ovom Care, said: “As an embryologist, I was devastated to learn of the unfortunate incident that has come to light at Guy’s hospital.
“Despite our best efforts to uphold the highest standards of care, incidents do occur, even if rarely. These errors, while rare, profoundly impact patients and the dedicated embryologists who strive to fulfil the shared goal of helping families conceive.
“It’s devastating news for those affected and they have our full support and we should wait to learn more from the professional team investigating this incident.
“But we must also recognise the tireless efforts of embryologists, who bear the weight of this responsibility and work diligently to maintain a low error rate.
“As fertility professionals, it’s our duty to utilise the most advanced tools available to minimise any risks that could affect our patients’ chances of having a baby. By embracing innovation and continually improving our practices, we can ensure that incidents like these become even rarer in the future.”
Sarah Norcross, director of the Progress Educational Trust (PET), commented: “It will be distressing for women with frozen eggs to learn that, due to problems outside their control, their eggs may not survive the thawing process.
“When a woman freezes her eggs, time is of the essence. In all cases, the quality of eggs declines upon reaching a certain age. Additionally, in cases where women are freezing eggs for medical reasons – for example, imminent cancer treatment – they will not want their treatment to be delayed.
“If women affected by this incident have undergone medical treatment which has compromised their fertility, then their opportunity to have a biologically related child may have been lost.
“If women affected by this incident had sought to extend their reproductive choices by freezing their eggs, then they too may have lost their best opportunity to have a family, if the quality of their eggs has declined during the period that has elapsed.”
She added: “We still do not know all the details of why this incident occurred. Hopefully, further details will be forthcoming. What does seem clear is that there was an appalling delay of around a year between this problem being known about, and affected patients being notified. Apparently, there are also some patients with frozen embryos who are similarly affected.
“We need to understand more about what precisely has gone wrong, and what the relevant regulators – including the HFEA and the MHRA – are doing about it. We also need reassurance, from regulators and clinics alike, that processes are in place to notify patients in a timely way when things go wrong.”
Becky Kearns, chief executive at Fertility Network UK, told Femtech World: “We are heartbroken to hear of the news that patients have potentially lost precious eggs and embryos.
“We want to reassure patients that incidents like this are extremely rare in the UK. We know that for many people, particularly those whose fertility has been impacted by cancer treatment, egg freezing can be a lifeline and can often be the difference between being able to have the family they have longed for.”
“As the national fertility charity, we urge anyone who may have been affected by this news, directly or indirectly, to please reach out to us for support. You are not alone.”
Mental health
Poor sleep linked to Alzheimer’s risk in older women – study

Poor sleep may signal higher Alzheimer’s risk in older women with greater genetic risk, a study suggests.
Older women who reported poorer sleep also showed greater memory difficulties and more Alzheimer’s-related brain changes, the study found.
That pattern appeared only in women with higher genetic risk, suggesting sleep complaints may be a stronger warning sign for some women than for others.
Researchers examined 69 women aged 65 years and older taking part in the Women Inflammation Tau Study, an ongoing project focused on ageing and Alzheimer’s disease risk.
Participants completed questionnaires about their sleep quality, underwent memory testing and received brain scans measuring tau. Tau is a protein that accumulates abnormally in Alzheimer’s disease.
The study found that poorer self-reported sleep was associated with worse visual memory performance and greater tau accumulation in brain regions affected early in Alzheimer’s disease, but only among women with higher genetic risk.
Women with lower genetic risk did not show the same relationship between sleep complaints, memory and tau build-up. The finding was specific to visual memory and was not observed for verbal memory.
Researchers said the results add to growing evidence that sleep disturbances and Alzheimer’s disease may reinforce one another over time.
Previous studies have suggested that disrupted sleep can contribute to the build-up of abnormal tau proteins, while Alzheimer’s-related brain changes may also interfere with healthy sleep patterns.
Because women account for nearly two thirds of Alzheimer’s cases and frequently report poorer sleep quality than men, the researchers said sleep may represent an important and potentially modifiable risk factor in older women.
The authors noted that self-reported sleep assessments are inexpensive and easy to administer, raising the possibility that sleep complaints could help identify people who may benefit from closer monitoring or early intervention.
They also suggested that improving sleep could become a target for future Alzheimer’s prevention strategies, particularly for women at elevated genetic risk.
Cancer
AI could transform ovarian care through personalisation, study finds

AI could transform ovarian care by personalising cancer and fertility treatment, but more clinical validation is needed before routine use.
A systematic review and meta-analysis found AI models showed high diagnostic accuracy for ovarian cancer when combining data such as ultrasound scans and blood test results.
Across 81 studies, AI models correctly identified ovarian cancer in around nine out of 10 cases, with pooled rates of 89 to 94 per cent.
They were also highly accurate at ruling out ovarian cancer when it was not present, with specificity of 85 to 91 per cent.
The analysis also found that explainable AI tools could predict complete surgical cytoreduction in advanced ovarian cancer.
Complete surgical cytoreduction means removing all visible cancer during surgery, which can be an important goal in treatment planning.
The tools achieved a pooled AUC of 0.87. AUC is a measure of how well a model distinguishes between different outcomes, with higher scores showing stronger performance.
In reproductive medicine, AI algorithms helped physicians optimise ovarian stimulation protocols and predict follicular growth during IVF.
Ovarian stimulation is the use of hormones to encourage the ovaries to produce eggs, while follicles are the small sacs in the ovaries where eggs develop.
The review found AI could reliably model ovarian response in IVF with a pooled AUC of 0.81.
However, researchers said challenges remain in translating promising research findings into routine clinical practice.
They identified substantial variation across studies, driven by retrospective study designs, variable AI systems and a lack of standardised validation.
Only 22 per cent of analysed studies reported prospective, multicentre external validation, where models are tested forward in time across multiple healthcare settings.
The authors called for rigorous validation to help close the gap between research and routine clinical practice, alongside standardised methodological and reporting frameworks, smooth integration with clinical workflow and robust governance to support responsible and ethical AI use.
They concluded: “Artificial intelligence is a transformative force in the management of ovarian conditions.
“In gynaecologic oncology, AI enhances every phase of care, from early detection and accurate diagnosis to prognostic stratification and surgical planning.”
In reproductive medicine, AI personalises ovarian stimulation and refines the diagnosis of heterogenous endocrine disorders such as PCOS.
PCOS, or polycystic ovary syndrome, is a hormonal condition that can affect periods, skin, weight and fertility.
Cancer
Three cancer innovators shortlisted for Femtech World Award

Femtech World is delighted to reveal the shortlist for this year’s Women’s Cancer Innovation award.
The award, sponsored by Endomag, will honour a groundbreaking innovation dedicated to the prevention, early detection treatment or ongoing care of cancers that uniquely or disproportionately affect women.
Endomag is a medical technology company devoted to improving the global standard of cancer care.
Its Sentimag system, Magseed marker and Magtrace lymphatic tracer are used by thousands of the world’s leading physicians and cancer centres.
After careful review of this year’s submissions, we are delighted to announce the three shortlisted entries for the Women’s Cancer Innovation Award 2026.

Auria is tackling one of the most stubborn problems in breast cancer screening: the 66 per cent of women who simply don’t participate.
Rather than improving existing imaging pathways, Auria is creating an entirely new access layer: a non-invasive, at-home test that detects protein biomarkers for breast cancer in tears.
Auria’s test, a CLIA-certified Lab Developed Test, has been validated across more than 2,000 patients in multiple clinical studies with collaborators including MD Anderson Cancer Center and Stanford University.
It reports a sensitivity of 93 per cent and a negative predictive value of 98 per cent.

Founded on six years of combined research at the University of Barcelona and UC Irvine, The Blue Box has developed a non-invasive, urine-based test that detects breast cancer by analysing volatile organic compound (VOC) signatures – no radiation, no compression, no imaging facility required.
The test achieves a sensitivity of 88.42 per cent, outperforming mammography by 15 per cent overall, and by 30 per cent specifically in women with dense breasts.
The technology could function as a first-line screening tool in primary care settings, as a complement to mammography for high-density patients, or as an accessible alternative in healthcare systems where imaging infrastructure is limited.

Celbrea is a disposable and affordable thermal screening device that empowers women of all ages to stay on top of monitoring their breast health.
The device aims to add to doctors’ existing standard evaluation protocols with a quick, painless examination. Celbrea does not replace a mammogram but simply provides an additional way to screen for breast disease, including breast cancer.
The device consisting of two disposable pads with photochromic sensors. The pads are self-applied to each breast for 15 minutes.
1188 nano-sensors are embedded within a biocompatible multilayer pad, accurately measuring any temperature differences on the surface of the breast using liquid crystal thermographic technology.
What happens next
The shortlisted entries will now be judge by an Endomag representative who will reveal the winner at a virtual awards event on June 19.
Winners will receive a trophy and will be interviewed by a Femtech World journalist.
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