Leiden University Receives ERC Advanced Grant to Research Ovarian Aging

Leiden University researchers received an ERC Advanced Grant to investigate methods for slowing the aging of ovaries, according to a university announcement on June 23, 2026. The project focuses on identifying the biological mechanisms that drive the decline of ovarian function to potentially extend reproductive lifespan and improve health outcomes during the menopausal transition.

The European Research Council (ERC) provides Advanced Grants to established research leaders who have a track record of significant achievements in frontier research. These grants are designed to allow researchers to pursue high-risk, high-gain projects that could lead to breakthroughs in their respective fields.

Why does ovarian aging occur?

Ovarian aging is characterized by the progressive loss of oocytes, or eggs, and a decline in the quality of the remaining follicles. Unlike most cells in the human body, women are born with a finite number of follicles that cannot be replenished, according to established medical research on reproductive biology.

As these follicles deplete through natural ovulation and attrition, the ovaries produce fewer hormones, specifically estrogen and progesterone. This decline eventually triggers the onset of menopause, marked by the cessation of menstrual cycles and a permanent end to natural fertility.

The research at Leiden University aims to pinpoint why some follicles deplete faster than others and whether specific molecular pathways can be modulated to slow this process. By understanding the triggers of oocyte loss, scientists hope to find ways to preserve ovarian reserve for longer periods.

How could slowing ovarian aging impact overall health?

Slowing the aging of the ovaries is not solely about extending fertility. The loss of ovarian function has systemic effects on a woman’s body. Estrogen plays a critical role in maintaining bone density and cardiovascular health, according to public health data from medical institutions.

A rapid decline in ovarian hormones is linked to an increased risk of osteoporosis and heart disease. If the aging process of the ovaries can be decelerated, it may potentially delay the onset of these age-related health complications.

This approach differs from hormone replacement therapy (HRT). While HRT treats the symptoms of estrogen deficiency after the ovaries have already aged or failed, the Leiden University research seeks to address the root cause by maintaining the organ’s function itself.

What is the significance of the ERC Advanced Grant?

The ERC Advanced Grant is one of the most competitive funding instruments in Europe. It differs from “Starting Grants” or “Consolidator Grants” because it specifically targets scientists who have already demonstrated a high level of independence and a history of impactful discoveries.

The award of this grant to Leiden University indicates that the proposed research on ovarian aging is viewed as a high-priority scientific endeavor with the potential to shift current medical understanding. The funding allows for long-term, intensive study without the immediate pressure of commercial application.

Current research into longevity often focuses on general cellular senescence—the process where cells stop dividing. This specific project narrows that focus to the ovary, an organ with a unique biological clock that doesn’t follow the same rules as other tissues in the body.

What happens next in the research?

The researchers will use the grant to map the molecular changes that occur within the ovarian microenvironment as it ages. They’ll look at how the supporting cells around the eggs contribute to their survival or degradation.

While the project aims to find ways to slow aging, the university has not yet announced specific therapeutic targets or expected timelines for clinical application. The initial phases will prioritize basic science to ensure any future interventions are based on a verified understanding of ovarian biology.