In simple terms: the transition years before menopause when hormone levels start to fluctuate.
Why it matters for PCOS
Perimenopause is the transition phase, often starting in the 40s, when estrogen and progesterone production becomes unstable and cycles grow irregular before they finally stop at menopause. For women with PCOS, this phase can be confusing because the symptoms overlap: irregular cycles, weight changes, sleep disruption, and mood shifts, making it hard to tell the cause apart without a doctor’s assessment.
Some PCOS symptoms such as irregular cycles may settle as menopause approaches, but metabolic risks like insulin resistance and cardiovascular concerns often persist and still need regular monitoring.
This glossary is education, not diagnosis. For your own situation, ask a doctor or pharmacist.