The Perimenopause Guide.
The hormone shifts, the symptoms nobody warned you about, and what you can actually do about all of it, from a physician who specializes in this transition.
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Your labs look normal. You do not feel normal.
You are in your late 30s or 40s and something has shifted. Your sleep is wrecked. Your mood swings from rage to tears. Your periods are unpredictable. Your brain fog is so thick you cannot find words. Your body is gaining weight no matter what you do. And your doctor says your labs look normal.
Welcome to perimenopause, the hormonal transition that can last anywhere from two to ten years and that nobody prepared you for. I wrote this guide because every woman deserves a real roadmap for this phase, not a shrug and a prescription for an antidepressant.
“Perimenopause is not a decline. It is the biggest intervention window of your life.”Dr. Amy Killen, MD
Get the Perimenopause Guide.
Your name and email, and it lands in your inbox with my free weekly notes on hormones.
- What is actually happening to your hormones, in plain language
- The symptom checklist, stage by stage
- The labs to request, and the treatment options that work
- How to find a provider who understands this transition
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Your Perimenopause Guide is on its way. Look for it in the next minute or two, and check promotions if it is not in the main inbox.
Six things the guide gives you.
What perimenopause actually is
Why it starts years before your last period, and the hormone shifts explained in plain language.
The symptom checklist
Hot flashes, night sweats, brain fog, mood changes, weight gain, insomnia, irregular periods, low libido, and the ones nobody connects to hormones.
Hormone optimization options
Estradiol, progesterone, testosterone, DHEA: what each one does and why you might need it.
Supplements and lifestyle strategies
Evidence-based options that make a meaningful difference alongside hormones, or without them.
What labs to request
The specific tests that tell the real story, not just FSH.
How to find the right provider
What to look for and what to ask, so you do not waste a year with a doctor who cannot help.
The guide is the map. The book is the whole territory.
The Female Longevity Advantage. On sale February 23, 2027. Pre-orders open.
Why women outlive men, why the ovary is the pacemaker of female aging, and exactly how to keep the advantage you were born with. Little, Brown Spark.
Pre-order the hardcover and three bonuses arrive by email, starting with my 14-page Midlife Hormone Field Guide, the one I give my own patients.
Dr. Amy Killen, MD
Emergency physician turned longevity and hormone doctor. Creator of the HOT Provider Course, co-pioneer of the Full Body Stem Cell Makeover, 200K+ followers on Instagram, and the author of The Female Longevity Advantage (Little, Brown Spark, February 2027).
© 2026 Dr. Amy Killen, MD. All rights reserved.