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One in five women conceive naturally after giving birth with fertility treatment

Many women may not realise that they could conceive naturally following fertility treatment, say experts

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One in five women who underwent fertility treatment such as IVF to conceive their first child are likely to get pregnant naturally in the future, researchers have found.

The first-of-its-kind research, conducted by the University College London (UCL) and published in the scientific journal Human Reproduction, analysed data from 11 studies of over 5,000 women around the world between 1980 and 2021, to evaluate how common it is to get pregnant naturally after having a baby conceived by fertility treatment.

It found that at least one in five women conceived naturally after having had a baby using fertility treatment such as IVF mostly within three years. This figure remained unchanged, even when taking into account the different types and outcome of fertility treatment – alongside length of follow up.

Infertility is defined by the failure to achieve a pregnancy after 12 months or more of regular unprotected sexual intercourse, and it is estimated to affect one in seven heterosexual couples.

However, not all women seeking and undergoing fertility treatment are absolutely or permanently infertile. Half of couples who struggle to conceive naturally in the first year of trying will go on to do so in the second year.

Although it is typically considered ‘rare’ for a woman to get pregnant naturally if she has previously had fertility treatment, the researchers highlighted that this is not an unusual event.

Lead author, Dr Annette Thwaites from the UCL EGA Institute for Women’s Health, said: “Our findings suggest that natural pregnancy after having a baby by IVF is far from rare.

“This is in contrast with widely held views – by women and health professionals – and those commonly expressed in the media, that it is a highly unlikely event.”

The team consider the findings to be particularly important, as many women may not realise that they could conceive naturally following fertility treatment.

This, experts say, could lead to them becoming pregnant again quickly or when they are not ready ready which could be problematic for both the health of the mother and child.

“Knowing what is possible would empower women to plan their families and make informed choices regarding further fertility treatment and/or contraception,” added Thwaites.

Patient stories

Shema Tariq, a doctor and academic from London, was diagnosed with low ovarian reserve and told that her chances of conceiving without IVF were almost zero. She now has two children aged three and four.

“It took six rounds of IVF to conceive our son, who was born in 2018,” she said.

“My GP briefly mentioned contraception to me after he was born, but we both laughed and agreed that it wasn’t relevant. It never occurred to me that I might get pregnant, despite being a sexual health doctor.  I was 43 and had been told that my chances of conceiving naturally were less than one per cent.

“Eight months later I was unexpectedly, and naturally, pregnant with our daughter. She has been the most wonderful surprise, but when we first found out I felt overwhelmed and unprepared for another pregnancy. If I’d known that one in five women conceive naturally after IVF I’d have used contraception until I was ready both emotionally and physically.”

After being diagnosed with endometriosis in her 20s, Sally Pearse was told by healthcare specialists that it was almost impossible that she’d ever conceive naturally.

Before having her first child she was told by a gynaecologist that due to endometriosis her only way to conceive was through IVF.

“After the birth of my first child though IVF, I met with the IVF consultant and asked if I may conceive naturally now I had had a successful pregnancy. I was told I had a one per cent chance of conceiving naturally so started plans for IVF again,” Sally explained.

“The next month I conceived naturally and went on to have my second child.

“I was not given a reason for the one per cent chance and feel that even experts in their role get these things wrong. If I hadn’t wanted another child I would have been shocked rather than pleasantly surprised.”

Fertility

Vipoglanstat trial reaches recruitment halfway point

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Vipoglanstat has reached the halfway point for patient recruitment in a phase 2 endometriosis trial.

Gesynta Pharma said 50 per cent of the target of 190 patients have been randomised in the NOVA trial.

The study is evaluating vipoglanstat, described by the company as a novel, non-hormonal, non-opioid drug candidate for the treatment of endometriosis.

Endometriosis is a chronic inflammatory condition where tissue similar to the lining of the womb grows outside the uterus, often causing severe pain and, in some cases, infertility.

The condition affects more than 10 per cent of women of reproductive age.

Top-line results from the study are expected in 2027.

The NOVA trial is a randomised, double-blind, placebo-controlled phase 2 proof-of-concept study evaluating vipoglanstat in women with endometriosis across Europe.

This means patients are assigned to treatment groups by chance, neither participants nor researchers know who receives the drug or placebo during the study, and the results are intended to show whether the treatment has enough evidence to move into later testing.

The trial is assessing the efficacy and safety of two dose levels of vipoglanstat and will provide information for the design of a subsequent phase 3 programme.

Eva Johnsson, chief medical officer and vice president of clinical development at Gesynta Pharma, said:

“Reaching the halfway point in patient recruitment marks a major milestone for our Phase 2 clinical trial in endometriosis. Achieved well ahead of schedule, the rapid progress reflects strong participation from clinical sites and great interest among eligible participants. This momentum highlights the urgent need for better treatments.

“We are now eager to complete enrolment and proceed to the next phase of evaluation.”

Patric Stenberg, chief executive of Gesynta Pharma, said:

“The NOVA trial is a significant advancement in a field with few ongoing clinical trials, and a key step toward establishing a strong foundation for a future Phase 3 programme for vipoglanstat.

“Given the immense medical need, our focus remains on delivering a treatment that is highly effective, safe, and well-tolerated.”

Vipoglanstat is an orally active drug candidate designed to reduce pain and inflammation by targeting mPGES-1, an enzyme that produces prostaglandin E2, a substance linked to inflammation in endometriotic lesions.

A preclinical proof-of-concept study in an advanced endometriosis model found that vipoglanstat significantly reduced pain-related behaviours and endometriotic lesion burden.

Gesynta said previous clinical studies have supported the drug candidate’s safety, tolerability and pharmacodynamic effects in humans. Pharmacodynamic effects refer to how a drug acts in the body.

NOVA stands for the Non-hormonal Option, a Vipoglanstat Assessment trial.

Endometriosis commonly presents with severe period pain, known as dysmenorrhoea, pain between periods, pain during sexual intercourse, gastrointestinal symptoms and infertility.

Current management is typically limited to painkillers, hormonal therapies and surgery.

Despite its prevalence, Gesynta said endometriosis remains a critically underserved area of women’s health.

The company said the disease is significantly underdiagnosed and undertreated, with few new treatment options available to patients.

Approximately 190 patients aged 18 to 45 will receive vipoglanstat or placebo over four menstrual cycles.

The primary objective is to evaluate the effect of vipoglanstat on endometriosis-related pain during non-menstrual days.

Secondary objectives include assessing the effect on menstrual pain, known as dysmenorrhoea, pain during sexual intercourse, known as dyspareunia, use of opioid rescue medication and quality-of-life measures.

Changes in endometriotic lesions, areas of tissue linked to the condition, will also be explored using MRI scans.

Gesynta Pharma said its research on targeting mPGES-1 began at Karolinska Institutet in Sweden.

The company said a second drug candidate, GS-073, is ready to enter clinical phase 1 for the treatment of chronic inflammatory pain.

Gesynta Pharma’s shareholders include Hadean Ventures, Industrifonden, Innovestor Life Science, Linc, HealthCap, XGen Venture and other specialist investors.

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Femtech World Awards 2026: Celebrating initiatives that move women’s health forward

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By Wolfgang Hackl, CEO, OncoGenomX Inc., Allschwil, Switzerland

As the FemTech World Awards 2026 winners are revealed, it is a privilege to reflect on the Research Award 2026 sponsored by OncoGenomX Inc., and on the exceptional standard set by this year’s finalists.

On behalf of OncoGenomX Inc., sincere thanks to every applicant and congratulations go to the nominees whose work continues to push women’s health innovation forward.

Research Awards matter because they do more than recognize excellence in a single moment; they help elevate the science, courage, and systems thinking needed to transform women’s health at scale.

This year’s three finalists represented three different but equally important forms of progress. Natural Cycles brought forward one of the largest studies ever conducted on menstrual and ovulatory patterns in perimenopause, analysing nearly one million cycles from more than 197,000 women across over 140 countries.

That project stood out for both its dataset scale and its ability to translate new evidence into a regulated product designed to support women navigating a historically under-researched life stage.

IVI RMA stood out for scientific rigor and clinical precision. Its multicenter, double-blinded, non-selection study on non-mosaic segmental aneuploid embryos offered high-quality evidence on implantation and live birth outcomes, helping move fertility care away from assumption and toward a more evidence-based approach to embryo management and patient counseling.

UN ESCAP’s ‘Femtech in South-East Asia: Unlocking innovation for women’s health’ stood out for a different reason.

Rather than focusing on one product area or one clinical question, it mapped an entire emerging ecosystem.

The report examined the state of femtech across key South-East Asian markets, documented barriers such as financing gaps, stigma, weak ecosystem support, and data challenges, and then translated that research into practical recommendations for governments, investors, founders, and ecosystem builders.

In many ways, all three finalists are winners.

Each project excelled on core evaluation criteria including originality, relevance, coherence, effectiveness, efficiency, impact, and sustainability.

Each also offered something genuinely valuable to the future of women’s health: stronger evidence, clearer decision-making, more informed product development, and greater visibility for unmet needs that have gone too long without sufficient attention.

The final decision was therefore a genuine head-to-head race.

The jury supported its discussion with a numerical scoring approach, but it also looked carefully at systems impact: the extent to which a project not only advances one intervention, but improves the wider conditions under which innovation can emerge, scale, and endure.

That perspective mattered in this category, because the strongest research is not always only the most technically impressive; sometimes it is the research that opens doors for many future innovations to follow.

On that basis, the OncoGenomX Jury selected UN ESCAP as the winner of the Research Award.

The decisive factor was not simply that the report was comprehensive, though it was.

It was that the project helps change the environment around innovation itself.

It provides a practical roadmap for strengthening research, improving data governance, expanding founder support, addressing gender bias in investment, scaling innovative finance, and integrating women’s health more fully into policy and development agendas.

That broader enabling effect is what distinguished the UN ESCAP project. Natural Cycles demonstrated outstanding research translation, and IVI RMA demonstrated exceptional clinical rigor.

UN ESCAP, however, showed how research can influence the structures that determine whether many other femtech solutions will ever be funded, adopted, trusted, and scaled. In that sense, its impact reaches beyond one company, one product, or one clinical pathway, and toward a healthier innovation landscape overall.

Warm congratulations again to all finalists and nominees.

And special congratulations to UN ESCAP on receiving the OncoGenomX Research Award at the Femtech World Awards 2026.

The jury’s decision reflects deep respect for all three projects and a shared belief that women’s health advances fastest when excellent science is paired with the power to reshape the systems around it.

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WEC Chair calls out Health Minister’s delay on banning BBLs and other harmful cosmetic procedures

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WEC chair Sarah Owen has criticised delays over a ban on high harm cosmetic procedures, including liquid BBLs.

The Women and Equalities Committee has published a letter from health minister Karin Smyth after the government missed the 18 April deadline to respond to the committee’s report on cosmetic procedures.

The report, published on 18 February, recommended that high harm procedures such as liquid Brazilian butt lifts, known as BBLs, should be banned immediately without further consultation.

MPs said the government is “not moving quickly enough” in introducing a licensing system for non-surgical cosmetic procedures and “should accelerate regulatory action”.

They also warned that “this lack of timely action is fostering complacency in self-regulation” within the industry.

In her letter, Smyth said the Department of Health and Social Care had “taken the decision to first of all focus on introducing legal safeguards for the cosmetic procedures posing the highest risks and I can confirm that we plan to consult on draft regulations in June”.

The letter added:

“Our intention is to issue a formal government response to the WEC report, once our consultation setting out our proposed approach and underpinning legislation is published.

“I acknowledge the concerns around the government’s pace of delivery in this area but, as you will appreciate, this is a complex area of policy and striking the balance between increased patient safety, placing new requirements on businesses and introducing proportionate and enforceable regulation is challenging.

“I recognise that regulation has not kept pace with the expansion of the aesthetics industry and, on that basis, I can assure you that we are committed to implementing licensing in the current parliament.”

Owen, chair of the Women and Equalities Committee and Labour MP, said:

“Further consultation and delay on clamping down on high harm procedures such as liquid BBLs is unacceptable. It allows unscrupulous people to continue to put women at risk and lets down those who have lost loved ones following these practices or who have come to serious harm themselves.

“As WEC’s report warned back in February, procedures that are deemed high risk such as liquid BBLs and liquid breast augmentations, which have already been shown to pose a serious threat to patient safety, should be banned immediately.

“While it is positive to hear a licensing system for non-surgical cosmetic procedures will be introduced within this Parliament, this issue requires faster regulatory progress, particularly in high harm areas, and the Government is not moving quickly enough.

“The Committee previously heard a powerful and shocking testimony from a woman who developed sepsis after having a liquid BBL. Her experience and those of many others provides clear evidence of the need to tackle this evolving wild west.”

A liquid BBL is a non-surgical procedure intended to alter the shape of the buttocks.

Sepsis is a potentially life-threatening response to infection that can lead to organ damage if not treated quickly.

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