Is it perimenopause? The early signs many women miss
Perimenopause can start years before your periods stop, and the first signs often aren't hot flashes. Here's what's happening, what it can feel like, and how testing works.
You're sleeping badly for no clear reason. Your periods are a little different than they used to be. You feel more anxious or short-tempered, you walk into rooms and forget why, and your jeans fit differently even though nothing else has changed.
Many women in their late 30s and 40s describe exactly this and assume it's stress, a busy season, or just getting older. Often, it's the start of perimenopause.
What perimenopause is
Perimenopause is the transition leading up to menopause, which is the point when you've gone 12 months without a period. The average age of menopause in the U.S. is about 51, and perimenopause typically begins in your 40s, though for some women it starts in their mid-to-late 30s.1,2
It isn't a single event. Perimenopause usually lasts several years, and for some women it lasts closer to a decade.1
Why it feels so unpredictable
During perimenopause, your hormones don't simply decline in a straight line. Ovulation becomes less regular, so progesterone often drops first. Estrogen can swing higher and lower than usual from one cycle to the next.3
That's why symptoms can come and go, feel worse some months than others, and be hard to pin down. It's also why many women are told everything looks fine: a single blood draw captures one moment in a system that's changing week to week.
Early signs many women miss
Hot flashes get the most attention, but they're often not the first sign. Many women who come to see us describe:
- Sleep changes. Trouble falling asleep, waking at 3 a.m., or night sweats. Sleep problems become more common as women move through the transition.4
- Mood shifts. New anxiety, irritability, or low mood. Research has found the risk of depressed mood rises during the menopause transition, even in women with no history of depression.5
- Changing periods. Cycles that are shorter, longer, heavier, lighter, or less predictable.
- Brain fog. Trouble finding words, focusing, or remembering things.
- Weight changes. Weight that shifts to your midsection, even without changes to how you eat.
- Other changes. Lower libido, vaginal dryness, joint aches, headaches, or heart palpitations.
Hot flashes and night sweats may follow, and they can last longer than many women expect. In a large U.S. study, they lasted a median of about 7 years in total.6
You don't have to wait for hot flashes, or for your periods to stop, to take your symptoms seriously.
Can a blood test tell you if you’re in perimenopause?
Not on its own. Because hormones fluctuate so much, clinical guidelines note that perimenopause is usually identified by symptoms and cycle changes in women over 45, not by a single hormone test like FSH.7
Labs are still very useful. They show where your hormones are now, rule out other causes like thyroid problems or low iron, and give a baseline to compare against as things change. The key is reading them alongside how you feel.
How we look at perimenopause
At Balanced Health, we focus on optimal ranges: where your body feels and functions its best, not just whether your results fall inside a lab's normal range. We start with a comprehensive panel, including estradiol, progesterone, total and free testosterone, FSH, thyroid, and adrenal and metabolic markers.8
From there, we build a plan around your symptoms and your labs. That may include bioidentical hormones, dosed for you and delivered as a cream, patch, pellet, injection, or under-the-tongue tablet, along with support for sleep, nutrition, and stress. Hormone therapy is an option for many women, and we review your health history and risk factors with you before starting.9 We retest and adjust as your body responds.
What you can do next
- Track your cycle and symptoms for two or three months, including sleep, mood, and energy. Patterns are easier to see on paper.
- Note when changes started and what else was happening at the time.
- If you’ve been told your labs are normal but you still don’t feel like yourself, ask which hormones were actually tested.
You can learn how we approach perimenopause and menopause, or book a free discovery call to talk it through. We see patients in person in Hammonton and virtually anywhere in New Jersey.
Founder of Balanced Health and a Georgetown University–trained women's health nurse practitioner with 25+ years in medicine and advanced training in functional medicine.
Meet our teamSources
- Harlow SD, Gass M, Hall JE, et al. Executive summary of the Stages of Reproductive Aging Workshop + 10: addressing the unfinished agenda of staging reproductive aging. Menopause. 2012;19(4):387–395.
- The Menopause Society. Menopause FAQs: understanding the symptoms. menopause.org
- Santoro N. Perimenopause: from research to practice. J Womens Health. 2016;25(4):332–339.
- Kravitz HM, Ganz PA, Bromberger J, et al. Sleep difficulty in women at midlife: a community survey of sleep and the menopausal transition. Menopause. 2003;10(1):19–28.
- Freeman EW, Sammel MD, Lin H, Nelson DB. Associations of hormones and menopausal status with depressed mood in women with no history of depression. Arch Gen Psychiatry. 2006;63(4):375–382.
- Avis NE, Crawford SL, Greendale G, et al. Duration of menopausal vasomotor symptoms over the menopause transition. JAMA Intern Med. 2015;175(4):531–539.
- National Institute for Health and Care Excellence (NICE). Menopause: identification and management (NG23). 2015, updated 2024.
- EVEXIAS Health Solutions. Practitioner clinical training in hormone optimization.
- The 2022 hormone therapy position statement of The North American Menopause Society. Menopause. 2022;29(7):767–794.
This article is for education only and isn't medical advice. Talk with your provider before starting or changing any treatment.