99% of UK Fertility Cycles Without Incident, Says HFEA Report

The Human Fertilisation and Embryology Authority (HFEA) reported that over 99 percent of fertility treatment cycles in the United Kingdom were completed without incident during the 2025/26 reporting period. While total recorded incidents, near misses, and cases awaiting classification rose by 19 percent compared to the previous year, the regulator attributed this increase largely to a higher volume of low-severity administrative errors.

Key Clinical Takeaways:

• Over 99 percent of all fertility treatment cycles in the UK were conducted without any reported incidents during the 2025/26 period.
• The 19 percent rise in reported events, totaling 942 cases, is primarily driven by an increase in low-severity administrative “Grade C” incidents.
• Clinics identified 141 non-compliances during inspections, showing that they are now more transparent and follow safety protocols more closely after previous high-profile incidents.

Safety Performance in the 2025/26 Fertility Sector

According to the Fertility Sector 2025/26 report published by the HFEA, the agency recorded 942 incidents, near misses, and cases awaiting classification. This figure includes one Grade A incident—the most serious classification—in which embryos belonging to more than five patients failed to develop as expected. An investigation into this event could not establish a definitive cause, and no regulatory action was required. Near misses, defined as events that cause no harm but possess the potential to do so, increased for the third consecutive year.

Peter Thompson, chief executive of the HFEA, stated that the data reflects a sector becoming more responsible and transparent when errors occur. He noted that clinics may be responding to learning opportunities shared by the regulator following high-profile incidents reported in 2023/24. Despite the rise in reporting, the HFEA maintains that treatment in UK licensed clinics remains highly safe.

HFEA Inspections Identify 141 Non-Compliances

HFEA inspections identified 141 non-compliances during the 2025/26 cycle, an increase of ten from the previous year. Seven of these were categorized as critical, the most severe level of non-compliance. Since 1 June 2025, the regulator has adjusted its reporting framework to categorize deviations that pose no significant risk as “observations” rather than non-compliances, a move intended to refine the focus on clinically significant safety issues.

While patient feedback remains positive, with a majority of individuals reporting they would recommend their clinics and felt treated with dignity, clinical risks persist. The report recorded 83 cases of severe or critical ovarian hyperstimulation syndrome (OHSS), a potentially life-threatening complication of fertility treatment. These cases occurred in less than 0.2 percent of all egg collection cycles.

Legislative Alignment with Clinical Evolution

The HFEA Annual Report and Accounts highlighted a growing tension between current regulatory frameworks and the pace of medical advancement. The regulator stated that the legislative basis for fertility and embryology regulation has not kept pace with scientific, clinical, and societal change. The report cited a lack of progress on legislative updates during the past year, emphasizing that the current infrastructure may require modernization to effectively oversee emerging reproductive technologies.

Disclaimer: The information provided in this article is for educational and scientific communication purposes only and does not constitute medical advice. Always consult with a qualified healthcare provider regarding any medical condition, diagnosis, or treatment plan.