Perimenopause blood tests: 8 markers worth knowing
Why "your labs are normal" can miss the full picture in your late 30s and 40s, and which hormone, metabolic and heart markers give a clearer view.
Waking at 3 a.m., weight settling around your middle, brain fog in meetings you used to run. Many women in their late 30s and 40s describe these changes, then hear the same reply: your labs look normal.
Often the issue is not that nothing is happening. It is that a routine checkup measures only a small slice of what changes in midlife.
Why hormone tests alone can be confusing
During perimenopause, estrogen and progesterone can rise and fall from week to week. A single estradiol or FSH reading is a snapshot, not a verdict, which is why clinicians look at symptoms, cycle changes and a wider set of markers together.
8 markers worth knowing
- Estradiol and progesterone: context for cycle changes, sleep and mood.
- FSH and LH: signals from the brain to the ovaries, read alongside your symptoms.
- Free testosterone and SHBG: how much testosterone is actually available, linked to energy and desire.
- TSH, Free T3 and Free T4: thyroid changes can mimic perimenopause.
- Fasting insulin and HbA1c: early signs of insulin resistance, a common driver of midsection weight.
- ApoB: counts the particles that build plaque, beyond standard cholesterol.
- Lipoprotein(a): largely inherited; the American Heart Association estimates about 1 in 5 people have high levels.
- Ferritin and vitamin D: low levels are linked to fatigue and hair changes.
"Normal isn't the same as optimal. You deserve your numbers, a clear plan, and to be taken seriously."
Why heart markers belong in a women's panel
Heart disease is the leading cause of death for women in the U.S., and risk rises after menopause. Knowing ApoB and Lp(a) early gives you time to act.
What to do next
The BRiO Women's Comprehensive Panel measures these markers and more in a single Quest Diagnostics draw. Not sure where to start? Take the 2-minute quiz to find your matched BRiO Protocol.
This article is educational and not medical advice. Lab tests and any treatment decisions should be reviewed with a licensed clinician.