What is PMOS? Understanding the 2026 PCOS name change

PCOS has been officially renamed to Polyendocrine Metabolic Ovarian Syndrome (PMOS). This landmark shift in women’s health matters for your hormones and overall wellbeing.

For decades, millions of women have navigated a condition labeled "Polycystic Ovarian Syndrome" (PCOS), a name that often led to confusion, stigma, and delayed care. As of May 2026, a global consensus published in The Lancet has officially renamed this condition to Polyendocrine Metabolic Ovarian Syndrome (PMOS).

The OAT Axis in Women’s Hormone Health

The Ovarian, Adrenals, and Thyroid (OAT) Axis plays a central role in women’s hormone health. When these three systems work in harmony, they regulate menstrual health, metabolism, fertility, mood, energy, and overall well-being. Disruption in any part of the OAT axis can lead to hormone imbalances and symptoms such as irregular periods, weight gain, or fatigue. In this article, we will talk about the OAT Axis in more detail, starting with the ovaries.