The brain on reproductive steroids
This presentation was delivered by Dr Rachael Sumner during Menstrual Health Week 2026 at the University of Auckland on Thursday 28 May, as part of the Menstrual Health Matters Symposium. Trigger Warning: This presentation discusses PMDD, suicidal ideation/attempt, mental health struggles, and themes of hopelessness. Please watch with care.
In her presentation, The Brain on Reproductive Steroids: Mental Health and Premenstrual Dysphoric Disorder, Dr Sumner explores how reproductive hormones – including progesterone and oestradiol – influence brain function and mental health throughout the menstrual cycle.
She also examines the latest understanding of brain changes associated with Premenstrual Dysphoric Disorder (PMDD) – a severe, cyclical mood disorder that remains widely misunderstood and under-recognised despite its significant impact.
This thought-provoking session highlights why greater awareness of PMDD matters, and how improved recognition can support earlier diagnosis, reduce stigma, and improve access to appropriate care and treatment.
Watch the full presentation below.
If You Need Support (Aotearoa New Zealand)
Need to talk? 1737 — Call or text 1737 for free, 24/7 support from a trained counsellor. Mental Health Foundation of New Zealand
Lifeline — 0800 543 354 or free text 4357 (HELP). Mental Health Foundation of New Zealand
Suicide Crisis Helpline (TAUTOKO) — 0508 828 865. Mental Health Foundation of New Zealand
Depression Helpline — 0800 111 757 or free text 4202. Mental Health Foundation of New Zealand
In an emergency, call 111.
(If you’re outside NZ, search “find a helpline” for your country’s services.) Mental Health Foundation of New Zealand
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