Fertility
Gut bacteria link to PCOS fertility problems, study finds

Lower levels of a gut microbe may help explain why women with polycystic ovary syndrome (PCOS) experience fertility issues.
New findings suggest that women with PCOS have around half the amount of a gut bacterium called Parabacteroides merdae compared to those without the condition.
PCOS is the most common hormonal condition in women of reproductive age and a leading cause of infertility, yet its causes and treatments remain poorly understood.
The condition can cause irregular or missed periods, weight gain, excessive hair growth, and increases the risk of type 2 diabetes, high blood pressure, heart problems and endometrial cancer.
In the study, 220 women under the age of 35 from 44 cities in China were monitored, half of whom had PCOS. All participants provided blood, stool and uterine lining samples.
Although both groups had similar pregnancy rates, women with PCOS were twice as likely to experience complications including miscarriage, preterm birth and gestational diabetes.
Researchers found that P. merdae plays a key role in converting isoleucine – an amino acid present in the gut – into short-chain fatty acids, which support reproductive health. Women with PCOS had higher levels of isoleucine in their blood and uterus, likely due to a lack of the bacteria needed to process it.
When scientists added extra isoleucine to uterine cells in the lab, the cells showed signs of premature ageing and stopped working properly.
This suggests that low levels of P. merdae could impair fertility by allowing isoleucine to accumulate and damage reproductive cells.
However, some doctors remain sceptical. Andrea Dunaif, from the Icahn School of Medicine at Mount Sinai in New York, told New Scientist that her research suggests fertility in women with PCOS often improves in their 30s – which would contradict the cell ageing theory proposed by this study.
Nonetheless, the findings may open up new avenues for treatment.
Dunaif said: “The microbiome is something [where] you could intervene with different probiotics to alter the [bacteria].
“So that is nice to have a potential target to treat because we don’t really have any specific treatments for PCOS.”
Entrepreneur
Fertility startup American Baby Company secures US$4m

A fertility startup has raised US$4m and will open its first lower-cost IVF clinic in West Palm Beach later this year.
It will offer a full IVF cycle, including medications, for US$8,995.
Around 12 per cent of American couples struggle with infertility, according to the company, but only 14 per cent of them receive IVF because of the cost.
A single IVF cycle costs an average of US$23,500, it said, with the cost nearly doubling if further cycles are needed.
Co-founder and chief executive Van Spina said: “We’re building ABC around a straightforward premise: IVF has become unnecessarily expensive, and many patients are priced out before they ever have a real chance to start a family.”
“This is personal for me. My fiancée and I went through IVF ourselves, including multiple failed cycles,” Spina continued, citing Jamie Rapp.
“That experience pushed me to build the kind of fertility company we wished had existed when we began treatment.”
The US$4m seed round was led by Wormhole Capital and Tower Research Ventures.
In a blog post, New York-based Tower Research described ABC as a new model for fertility care, praising its “evidence-based protocols, AI-assisted intake, and modern lab workflows.”
“When we met the team at The American Baby Company (ABC), we saw an opportunity to rethink how fertility care is delivered in the US from the ground up,” the post said.
Co-founder and chief medical officer Dr Paul Magarelli is a board-certified reproductive endocrinologist and one of the most prominent voices in the US on expanding access to fertility care, according to Tower.
Reproductive endocrinology is a branch of medicine concerned with hormones and fertility.
Magarelli developed the Clinical Fertility Physician certification programme, which trains generalist clinicians to deliver routine fertility procedures under specialist oversight.
Spina spent his early career as a technology investor at Warburg Pincus before founding an institutionally backed data business in private credit.
“We’re on a mission to become the place Americans go to start their families,” Spina said.
“Our 10-year goal is to help make 250,000 babies per year.”
Entrepreneur
Onto Health acquires diagnostics software company Levy Health

Onto Health has acquired Levy Health, a fertility software company providing precision diagnostics and patient intake for reproductive medicine.
The acquisition, fuelled by Onto Health’s US$20m Series A fundraise in April, supports its plan to build scalable, tech-enabled infrastructure for reproductive medicine.
Onto founder Roohi Jeelani, MD, called it the first of several moves in the company’s expansion strategy in a LinkedIn post, adding that there was “more coming soon”.
She said: “This isn’t just an acquisition, it’s proof of how we’re building Onto: physician-led, tech-enabled, and built to scale without losing the personal touch fertility patients deserve.”
Headquartered in Chicago, Onto Health combines evidence-based fertility care with artificial intelligence-driven diagnostics, clinical automation and longevity science.
AI-driven diagnostics use software to analyse patient information and support clinical decision-making, rather than replace clinicians.
Levy Health, founded in Berlin with US offices in San Francisco, helps medical providers identify endocrine disorders more quickly and helps clinics streamline fertility workups.
Endocrine disorders affect the body’s hormone system, which can influence ovulation, menstrual cycles and fertility.
Co-founder Caroline Mitterdorfer said joining Onto would expand Levy Health’s fertility care tools to more clinics and patients, helping physicians focus on patient care.
Onto opened its first clinic in Chicago in February, with plans for three more in the greater Chicago area.
The company said in April that it would use its new funding, led by Artis and Humania, to support additional operations in the US and expand into the Gulf Cooperation Council.
The Gulf Cooperation Council includes six Arab states bordering the Persian Gulf.
Insight
Softening ovaries could extend fertility as women age, study suggests

Softening ageing ovaries could help women remain fertile for longer, early animal research suggests.
Fertility declines with age for several reasons, including poorer egg quality, fewer ovarian follicles and the gradual stiffening of ovarian tissue.
Existing fertility treatments, including hormone therapy and in vitro fertilisation, mainly address hormonal imbalances or help eggs mature or become fertilised.
Scientists are now examining whether changing the physical structure of the ovaries could provide another route for future fertility treatments.
Stuart A. Cook, of the Cardiovascular and Metabolic Disorders Programme at Duke-National University of Singapore Medical School, published an accompanying commentary on the research.
Researchers led by Shixuan Wang at Huazhong University of Science and Technology in Wuhan, China, collected healthy ovarian tissue from younger, middle-aged and older women.
They also examined samples from patients with polycystic ovary syndrome, known as PCOS, premature ovarian insufficiency, or POI, and endometriosis.
PCOS is a hormonal condition that can disrupt ovulation. POI occurs when the ovaries stop working normally before the age of 40, while endometriosis causes tissue similar to the womb lining to grow elsewhere in the body.
Tests of protein levels and gene activity found higher levels of the inflammatory protein interleukin-11, or IL-11, in ageing and diseased ovaries.
In laboratory experiments, the researchers exposed ovarian fibroblasts to IL-11. Fibroblasts are cells that produce connective tissue.
The protein caused the cells to produce excess collagen, a structural material that can build up during scarring and make tissue stiffer.
The researchers then genetically modified mice so they could not respond to IL-11. The animals developed less ovarian stiffening and maintained better ovarian function as they aged.
Similar results were seen in mouse models of PCOS and POI caused by chemotherapy.
In the final part of the experiment, older mice and rats were injected with a nanoparticle treatment containing small interfering RNA, or siRNA, designed to switch off IL-11.
The treatment made the animals’ ovaries less stiff and improved fertility.
Pregnancy rates among older mice rose from 25 per cent to 50 per cent, while average litter sizes also increased.
More rats treated with the therapy became pregnant and produced larger litters.
The approach remains highly speculative and will require considerably more research before its safety or effectiveness in women can be established.
However, the researchers said blocking the inflammatory pathway could eventually form the basis of new fertility treatments.
They said: “We propose that anti-IL-11 therapy represents a promising translational strategy for delaying ovarian ageing.”
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