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A labour of love: making pregnancy and childbirth safer with 80% more accurate foetal oxygen monitoring

By Annie Theriault, managing partner at Cross-Border Impact Ventures (CBIV)

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For expecting mothers, the process of bringing life into the world has remained the same since the beginnings of mankind, but what has changed is the outcome.

Thanks to modern medicine, over the last century maternal deaths associated with childbirth have decreased by nearly 99 per cent in developed countries. And better outcomes for mothers lead to better outcomes for newborns, as well as the entire family.

Advancements in medical technology, coupled with access to high-quality prenatal care, have been game changers for maternal and newborn health. Ultrasounds, electronic foetal monitoring, and pulse oximetry have become table stakes in the delivery room, helping to detect and manage high-risk pregnancies and reducing complications in the delivery room.

Despite this progress, women in the US are still three times more likely to die from pregnancy-related complications than women in other developed countries, a statistic that is significantly worse for women of colour [1]. These are sobering facts for the world’s highest-income nation, as the World Health Organization considers prenatal care and infant mortality rates to be important measures of healthcare quality.

One factor contributing to this troubling statistic is the alarming exponential increase in unnecessary procedures such as the Caesarean section (C-section) to deliver babies.

When utilised appropriately, C-sections have saved millions of lives for mothers and babies, but also carry significant risks associated with major abdominal surgery that result in short- and long-term consequences for both mother and baby.

The increasing C-section rates are tied to increasing maternal morbidity and mortality, and is an issue that has recently received attention from Dr Jill Biden and the White House [2]. It is reported that over half of all C-sections are medically unnecessary – yet they have become so prevalent that one in three American women will deliver their baby through this surgical procedure [3].

Detecting foetal distress: heads or tails? 

One company aiming to remedy this is Raydiant Oximetry out of San Ramon, California and Cork, Ireland. Founded in 2016 by Dr Neil Ray, a paediatric anaesthesiologist, Raydiant Oximetry is using the principles of pulse oximetry to more accurately detect foetal distress during labour and delivery to reduce the overuse of emergency C-sections and improve outcomes for both mother and baby.

Pulse oximetry technology is used to diagnose low oxygen levels in virtually every clinical setting, but no such technology has existed for foetuses in the labor ward. Raydiant Oximetry is on the path to commercialising Lumerah™, a low-cost and non-invasive photonics sensor that monitors foetal oxygenation during labour.

Every year in the US, approximately 3.4 million women (85 per cent of all births) are placed on foetal heart rate monitors during pregnancy [4]. However, current foetal monitoring technology has the accuracy of a coin toss in accurately predicting foetal distress [5].

The false positive rate for foetal heart rate monitors has been reported to be as high as 89 per cent and as a result, clinicians struggle to determine when an emergency intervention is truly indicated [6]. Emergency C-sections are consequently performed for medical-legal liability fears which drive up hospitalisation costs and leave mothers with increasing rates of postpartum depression and PTSD [7].

Lumerah promises to change all of this by detecting foetal distress more accurately with a non-invasive, transabdominal approach that directly measures foetal arterial blood oxygen levels. This will give clinicians more accurate data and insights, enabling them to make better-informed labor and delivery decisions.

In a recent clinical study completed at University of Texas Medical Branch (UTMB) in Galveston, Texas, Lumerah demonstrated a false positive rate of 19 per cent for detecting foetal distress [8].

The path to commercialisation

Although not yet commercially available, Lumerah is getting the attention it deserves because of its life-improving potential. The US Food and Drug Administration (FDA) has granted Lumerah the status of Breakthrough Device to expedite its market approval.

Most recently, Raydiant Oximetry was named by the National Institutes of Health (NIH) as one of six finalists in the RADx Tech Challenge, a competition to identify companies that are enhancing foetal health diagnostics. The company received US$75,000 to fund ongoing technology development, and is now in the running for a larger prize that will be announced in October.

Furthermore, Raydiant Oximetry recently received IDE approval from the FDA in April to initiate a clinical study of Lumerah at Eastern Virginia Medical School (EVMS) in Norfolk, Virginia. The study began in May and is expected to be completed by the end of 2024 [9].

Raydiant Oximetry’s innovation in the obstetrical space is just getting started with Lumerah. The company has developed the Daisy TM device as well. Daisy was developed to prevent postpartum haemorrhage (PPH) for a woman undergoing a C-section delivery, which complements other PPH devices on the market that treat PPH in women that had a vaginal delivery.

PPH is the leading cause of maternal mortality around the globe and takes the life of an expecting mother every four minutes [10]. A clinical study of Daisy was also initiated at EVMS this past May and expected to be completed by the end of 2024 [11].

Importantly, not only is the company aiming to transform maternal care in the US, but it is already working with global health funders and experts to ensure that these technologies also become accessible in low- and middle-income countries where, according to the WHO, nearly 95 per cent of all maternal deaths occurred in 2020 [12].

Keeping mothers and babies safe during labour and delivery

Raydiant Oximetry is creating a new benchmark in obstetrics care that will benefit countless mothers and babies around the world. The history of childbirth shows us how far we have come, but also how far we still need to go – especially in addressing inequalities.

Continued investment in transformative healthcare companies with a global lens can propel further progress in maternal and newborn health. Access to better health technology that transcends borders will benefit women, children, and the world at large.

Annie Theriault is a managing partner at Cross-Border Impact Ventures (CBIV), an impact venture capital firm investing in women’s, children’s and adolescents’ health technology companies addressing large international markets. Raydiant Oximetry is a CBIV portfolio company. 

 

REFERENCES:

1 https://www.cdc.gov/nchs/data/hestat/maternal-mortality/2021/maternal-mortality-rates-2021.pdf

2 https://www.whitehouse.gov/briefing-room/statements-releases/2022/06/24/fact-sheet-president-bidens-maternal-health-blueprint-delivers-for-women-mothers-and-families/

3 PMID 24565430

4 PMID 19546798

5 PMID 23009972

6PMID 14749646

7 PMID 35457767

8 https://clinicaltrials.gov/study/NCT05147584

9 https://clinicaltrials.gov/study/NCT06405984

10 PMID 17012482

11 https://clinicaltrials.gov/study/NCT06219538

12 Maternal mortality (who.int)

Insight

New pregnancy treatment shows promise for at-risk twins

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A high-powered ultrasound treatment could help identical twins affected by a rare and serious condition during early pregnancy, an initial study suggests.

Twin-to-twin transfusion syndrome, or TTTS, causes uneven blood flow between identical twins who share a placenta.

The imbalance can leave one baby dangerously small and the other too large, putting both babies’ survival at risk.

 

Brioney Garrett’s daughters were in danger before doctors used the world-first treatment to seal the blood vessels causing the problem without an operation.

Nancy and Margo were born healthy and, now aged four, are due to start school.

Researchers from Queen Charlotte’s and Chelsea Hospital tested the non-invasive procedure in 10 women from the UK and elsewhere in Europe after scans detected TTTS during early pregnancy.

Five women needed further treatment, while 12 of the 20 babies survived following the procedure.

The researchers described having a treatment that did not require a needle or telescope to be inserted into the mother’s abdomen as “extremely exciting”.

However, they said larger studies involving more pregnant women were needed before the procedure could be offered more widely.

Garrett described her daughters as “my miracle twins”.

She said: “We were in a very dire situation and I don’t forget that.

“It stays with me always how things could have been. Every day I still count my blessings.”

TTTS affects between 10 and 15 per cent of identical twins who share a placenta, representing around 300 to 400 pregnancies in the UK each year.

The uneven blood flow causes excess fluid to build up around the larger recipient baby, while leaving dangerously little fluid around the smaller donor baby.

Treatment usually involves inserting a needle into the womb to drain some of the fluid or using a laser to seal the connecting blood vessels.

Garrett’s procedure took about 20 minutes. She lay flat while a specially designed machine directed high-powered ultrasound waves at small blood vessels in her placenta.

She said: “It was very quick and pretty painless.”

Christoph Lees, head of fetal medicine at Imperial College Healthcare NHS Trust and professor of obstetrics at Imperial College London, described the research as “very promising”.

He said: “If this could work in a fully-fledged study, it could give hope to a lot of women who otherwise might have to have quite invasive treatment.”

Ultrasound is commonly used during medical scans to produce images of the body, but this procedure uses much more focused waves.

Heat generated by the waves can seal blood vessels about 2mm in diameter and located around 5cm to 6cm beneath the skin.

The procedure blocked blood flow in 90 per cent of the vessels treated during the study, with no unwanted side-effects reported.

Twins Trust, which supported the study, said the approach could make a significant difference for families affected by TTTS.

Helen Peck, head of healthcare engagement and research, said: “Any procedure that is non-invasive and can potentially identify TTTS earlier and improve outcomes for our families with this life-threatening condition could be a turning point.”

Scans carried out weeks after Garrett’s procedure showed that blood flow between the babies had been rebalanced, although other problems developed during the pregnancy.

Garrett said Margo, who had too little fluid around her, “was in a much better position” and that “the strain on Nancy’s heart had eased”.

Nancy and Margo were born at nearly 34 weeks, weighing 3lb 7oz and 3lb 3oz respectively.

Garrett said: “They were both healthy, and Margo wasn’t as small as we worried she was going to be.”

The twins are due to start primary school in September.

Garrett said: “They’re funny, smart, energetic little girls that just fit right in with their age group.”

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Pregnancy

New reporting tool targets maternal-fetal teams as pregnancy complexity rises

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A new reporting tool built specifically for obstetrics and maternal-fetal medicine has launched, aimed at teams managing increasingly complex pregnancies with limited time and resources.

Trice Imaging has released Trice Workspace Reporting, which connects imaging, reporting and longitudinal patient data in a single workflow to support faster clinical decision making.

Birth rates are falling worldwide, but pregnancies are getting more complicated. Advanced maternal age, IVF-assisted pregnancies, rising obesity rates and a higher prevalence of hypertension and diabetes mean more cases now require specialist monitoring, advanced imaging and multidisciplinary care.

At the same time, clinical teams are stretched and facing growing administrative demands.

Trice Workspace Reporting brings together customisable reporting, dynamic pregnancy dating and longitudinal patient history with an AI-ready, EHR-interoperable infrastructure, all inside the company’s Tricefy image management platform.

The company says it aims to accelerate standardised and synchronised report turnaround, support timely clinical decisions and improve operational efficiency for fetal medicine services.

“Maternal fetal medicine teams are managing increasingly complex pregnancies while being asked to do more with limited time and resources,” said Mark A. Samii, chief revenue officer at Trice Imaging.

“Trice Workspace Reporting is designed to remove unnecessary friction from reporting by creating a structured digital foundation that supports today’s need for connected clinical workflows.

“It also provides a digital foundation as practices prepare for tomorrow and the evolution of AI-enabled fetal assessment, anomaly detection and outcome prediction technologies.”

Trice Imaging describes its mission as transforming the women’s health journey by connecting physicians, patients and healthcare systems. From independent practices to large hospital ecosystems, it aims to reach the entire women’s health continuum, spanning IVF and reproductive health, maternal-fetal medicine and OB/GYN, and onwards to lifelong women’s health.

For more than 17 years the firm has worked on cloud-based storage, retrieval, display, organisation and exchange of ultrasound medical images and associated information across health environments.

Its wider platform now extends to dynamic clinical reporting, AI-driven workflow optimisation, data analytics and secure patient engagement.

Trice Imaging holds regulatory and data protection clearances in 40 countries. It has offices in Miami and Stockholm, alongside a growing network of global distributors.

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Opinion

Women’s Health has waited long enough for innovation

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By Dr Fran Conti-Ramsden, clinician at Guy’s and St Thomas’ NHS Foundation Trust, academic at King’s College London, and chief medical officer of MEGI Health.

A woman gives birth. A few days later she goes home, often with a bag of medication for her blood pressure, and then, very often, very little structured follow-up for her heart (cardiovascular) health.

In my clinical work, and through our collaboration with Action on Pre-eclampsia, I see and hear about this postnatal cliff edge again and again, and it still shocks me.

We invest a lot of medical care and attention whilst a woman or birthing individual is pregnant, then, at the very moment emerging evidence suggests we have a window of opportunity to modify long-term health, the support falls away.

That cliff edge is a symptom of a deeper issue: we have come to treat “women’s health” as a synonym for reproductive health. Pregnancy, periods and fertility, important as they are, have crowded out everything else.

Yet the conditions that do most to shorten and limit women’s lives are not reproductive at all.

Cardiovascular disease is the leading cause of death in women worldwide, and it is still too readily thought of as a man’s problem.

Heart disease in women is more likely to be missed and under-treated, in part because for decades women were under-represented in the research that built our knowledge.

Pregnancy makes this vivid.

Conditions such as pre-eclampsia are not only risks to be managed for nine months; they are early warnings about a woman’s future, markers that she is more likely to develop heart disease and high blood pressure in the years to come.

We have the knowledge to act on that. What we mostly do instead is discharge her and look away.

This is exactly the kind of problem better tools should help us solve: spotting risk earlier, supporting women and their clinicians through the vulnerable postnatal window, and providing continuity where the system currently provides a drop due to lack of capacity.

Artificial intelligence and digital health have real potential here; in risk prediction, in monitoring blood pressure at home, and in helping stretched clinicians know who needs attention and when.

And yet this is not where most of the energy is going.

It is far easier to build, fund and scale an app that tracks a cycle than a tool that changes the trajectory of a woman’s heart.

So, innovation clusters at the lighter, lower-risk end of innovation, while the conditions that actually kill and disable women, and moments like the postnatal cliff, stay under-served.

Closing the women’s health gap could add at least a trillion dollars to the global economy each year, the World Economic Forum estimates, but the bigger prize is women living longer, healthier lives.

None of this means technology is a cure in itself. It is a tool, and a tool built carelessly can do harm.

Because women have been under-represented in medical data, systems trained on that data can quietly carry the same blind spots forward, deepening inequalities rather than closing them.

Responsible innovation, with clinical-grade evidence, privacy and equity designed in from the start, and tools built around real clinical pathways rather than bolted on afterwards, is not a brake on progress.

It is the only version of progress worth having.

I am optimistic, because a serious community is forming around exactly these questions and the appetite to get it right is real.

It is why, at MEGI, we are bringing clinicians, researchers, founders, regulators and investors together for our AI × Women’s Health summit on 25 June.

If we keep our focus on the conditions that matter most to women’s lives, and build the tools to meet them responsibly, the postnatal cliff edge could become something else entirely: the moment the system finally catches her and delivers preventative healthcare.

AI × Women’s Health: Innovation, Challenges and Opportunities summit is taking place on Thursday 25 June 2026 at the London Institute for Healthcare Engineering. The event is free and is fully booked and operating a waiting list. Join the waiting list here.

About Dr Fran Conti-Ramsden

Dr Fran Conti-Ramsden is a UK Obstetrics and Gynaecology registrar and Chadburn Clinical Lecturer at KCL passionate about transforming women’s health through technology and innovation.

Combining NHS clinical experience with an MRC-funded PhD, recent NHS Clinical AI fellowship and commercial role as Chief Medical Officer at Megi health, she works at the intersection of clinical medicine, data science, technology and AI.

Her current programme of research focuses on the intersection of healthcare and technology; leveraging advances such as smartphone based vital signs capture and large language models to drive forward scalable innovation in maternal cardiovascular care.

She has published over 20 peer-reviewed manuscripts (See gScholar, h-index 12), including award-winning work recognized by Hypertension Journal.

She was awarded an AI visionary award in 2025 by Health Innovation KSS was the recipient of the 2024 International Society for the Study of Hypertension in Pregnancy Zuspan prize.

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