Originally published by RNZ 11 August 2025.
New Zealand’s “outdated” guidelines for treating the pelvic inflammatory disease endometriosis are delaying diagnosis and treatment for sufferers, warns an advocacy group.
Endometriosis New Zealand spokesman Dr Michael Wynn-Williams said new guidelines developed by the Royal Australian and New Zealand College of Obstetricians and Gynaecologists (RANZCOG) were already being implemented in Australia for the painful condition, which affects about one in 10 women and girls.
“This new guideline represents the gold standard in evidence-based care and is already being implemented across Australia,” Wynn-Williams, who chairs the clinical advisory committee, said.
It recommends the use of non-invasive imaging, such as pelvic ultrasound, as a first-line diagnostic tool, moving away from reliance on diagnostic laparoscopy, which has contributed to long wait times for diagnosis.
The current 2020 Ministry of Health document was no longer fit for purpose and needed to be urgently replaced with the new Australian Living Evidence Guideline, he said.
“Our current guideline is now outdated, and out of step with modern diagnostic and treatment practices.
“By contrast, RANZCOG’s new guideline reflects the latest evidence and provides clear recommendations for early diagnosis, as well as first-line hormonal treatment to be run in parallel with diagnostic investigations. These are crucial to reducing the delays in diagnosis and treatment that too many patients still experience.”
Endometriosis New Zealand chief executive Tanya Cooke said adopting the new guideline would bring New Zealand into line with global best practice, and ensure patients received faster, less invasive and more equitable care.
“We have written to the ministry and [Health New Zealand] Te Whatu Ora, urging them to adopt the new guideline as soon as possible,” she said. “It’s also really important that they work with RANZCOG and others to support application of it across the sector, and for the benefit of the 120,000 New Zealanders living with endometriosis.”
Officials respond
The Health Ministry said in a statement it was “grateful for the important work that RANZCOG has undertaken in developing these guidelines to support clinical care in this important aspect of women’s health”.
“These guidelines represent a valuable resource, informing clinicians of evidence regarding diagnosis, management and care of people living with endometriosis.
“Health New Zealand has established processes, through clinical networks and health pathways, to consider clinical guidelines and how they might influence on clinical service delivery to achieve better outcomes for New Zealanders.”
Health NZ national chief medical officer Professor Dame Helen Stokes-Lampard said clinical guidelines and health pathways were reviewed regularly.
“Our immediate focus is on urgent patients and those who have been waiting the longest for treatment,” she said. “We continue to work hard to put in place systems and processes, so improvements to waiting times are made.”
About Endometriosis New Zealand
Endometriosis New Zealand is the national organisation for endometriosis – dedicated to providing support, advocacy, research, information, education, and awareness on endometriosis. We are committed to improving the lives of individuals impacted by this condition and helping them find a way forward with hope and strength.