I knew she hadn’t slept when she walked into my medical office. After 30 years in practice, you learn the signs: the extra concealer under the eyes, the tight grip around the coffee cup, the set jaw. She was 42, the founder of a nonprofit she had built from nothing, and the mother of a tween daughter. For the past three years, she had been waking up at 3 or 4 a.m., wide awake, her mind racing from grant deadline to board meeting to sudden moods.
She’d told her doctor the symptoms of bone-deep exhaustion, irritability, and mood swings. Her doctor ordered a few labs, glanced at the results, declared them normal, and delivered the classic line: *you’re too young for perimenopause, and certainly too young for hormone therapy. *
No further questions. Presumably she was meant to come back in a decade.
By the time she reached my office, she’d spent years running an organization devoted to caring for other people while her own reserves drained, and she’d arrived at the conclusion so many women reach when no one bothers to look further: the problem must be her. I saw perimenopause, and showed her the labs that demonstrate it. At 42, she was right on time. Plenty of women start years earlier.
The phrase “too young” sounds like a medical fact, but it’s really an old story we’ve been told that menopause is a single event that happens around age 51, and nothing before it is worth measuring or treating. However, your body doesn’t work that way. The change to menopause unfolds over years, usually seven years and sometimes more. Your sleep may change, contributing to the doubling of the risk of insomnia in women compared to men. You may feel irritable, anxious, moody, and more stressed, like you’re beyond your capacity. Your cycles shift long before your final menstrual period. The hormonal shifts underneath these perimenopausal shifts can begin even when the menstrual cycle appears normal. [1]
Women feel it earlier than mainstream medicine expects. In a 2025 survey of more than 4,400 American women, 55 percent of those aged 30 to 35 reported moderate or severe symptoms on a standard menopause rating scale, and anxiety, low mood, and irritability showed up well before hot flashes did [2]. Only about 4 percent of that youngest group had talked to a clinician about their symptoms. The survey drew on app users and measured symptoms that can have other causes, so it can’t tell us how many of those women were in perimenopause. Even so, that’s a lot of women in their early thirties struggling, and very few of them were asked about it.
Menopause doesn’t arrive overnight. Your cycles start changing years before your last period, and your hormones can start shifting even while your periods still look normal.
I was taught in residency that perimenopause was a brief slope down to menopause, something to watch rather than treat. I know now that it can stretch across years and upend a woman’s life as thoroughly as puberty did. Training hasn’t caught up. In a survey of residents in family medicine, internal medicine, and obstetrics and gynecology, about 7 percent felt adequately prepared to manage menopause, and one in five reported receiving no menopause lectures at all [3].
The age warnings in The Menopause Society’s hormone therapy position statement point the other way. They concern women who start hormones after 60 or more than ten years past menopause. For women younger than 60 or within ten years of menopause who have no contraindications, the statement calls the benefit-risk ratio favorable for bothersome hot flashes, and for women whose menopause comes early, it recommends hormone therapy until at least the average age of natural menopause [4]. Age alone is a poor reason to withhold care, and her symptoms and her own priorities should weigh far more.
FSH and estradiol swing widely in perimenopause, sometimes within a single cycle [5]. A normal FSH on one day says little about the next. UK national guidelines advise diagnosing perimenopause in otherwise healthy women over 45 from symptoms and irregular periods alone, without lab tests, and they reserve FSH for narrower cases, such as women 40 to 45 with symptoms or women under 40 when early menopause is suspected [6].
Early in the transition, estrogen can run high and erratic while progesterone in the second half of the cycle falls [7]. A single blood draw is a snapshot of one morning, and it can miss all of it. When a woman’s story and her labs disagree, I trust the story and keep looking.
Progesterone is one of the body’s natural calming agents. Its metabolite allopregnanolone acts on the same GABA receptors that sedatives target [8]. When ovulation becomes less reliable and progesterone drops, many women lose that background calm. In the large SWAN cohort, trouble falling asleep and trouble staying asleep both became more common as women moved through the transition [9]. In a Canadian trial of 189 perimenopausal women aged 35 to 58, those randomized to bedtime oral micronized progesterone reported fewer night sweats and better sleep than those on placebo, though the trial’s main hot flush score didn’t separate significantly from placebo [10]. The evidence is early, and women shouldn’t have to wait for it to finish before they get a real conversation.
SWAN also found that women in early perimenopause had higher odds of irritability, nervousness, and frequent mood changes than women still in premenopause [11]. Irritability rarely appears on standard symptom checklists, so women and their doctors file it under stress or personality. My patient believed she was failing as a mother. Her hormones were fluctuating and her sleep was broken, and she was carrying an organization and a family on the same shoulders.
Her daughter was approaching one hormonal transition while she moved through another. Two nervous systems in one kitchen, both changing, and only one of those transitions had a name.
We expect women at 42 to lead organizations, raise children, and care for aging parents. Then we tell them they’re too young for help when their bodies change under the load. Most of us agreed to that arrangement long before we knew we had a choice. We learned to treat our own unraveling as a personal failing and to wait until we were old enough to deserve help.
Bring this page to your next appointment. If you only remember three, remember the sleep, the temper, and the cycle changes.
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Sleep that breaks, especially waking between 3 and 5 a.m. and staying awake.
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Irritability or rage that feels unlike you, often worse before your period.
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Cycles that change by a week or more in length from one to the next, or get heavier or harder to predict.
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Night sweats or flushing, especially in the days before your period.
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New anxiety, worsening PMS, breast tenderness, or brain fog.
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Could my symptoms be perimenopause, even at my age?
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Since FSH and estradiol swing from day to day, will you treat based on my symptoms?
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Is bedtime oral micronized progesterone, or hormone therapy, an option for me?
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Can we check my thyroid (TSH, free T4, and thyroid antibodies), ferritin, ApoB, and Lp(a)?
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Should I be screened for sleep apnea?
Early waking has other causes, and a good workup checks them. Sleep-disordered breathing becomes more common after menopause [12], a glass of wine at dinner can fragment the second half of the night, and depression often announces itself with early-morning waking. Thyroid disease and low iron can drive both fatigue and irritability, and heavy perimenopausal periods drain iron stores. Women in perimenopause can still conceive, so contraception matters, and progesterone taken for sleep won’t prevent pregnancy.
This is also the window to look at your heart. Total cholesterol, LDL, and ApoB climb in the year around the final period, beyond what aging alone explains [13], and in a large Danish cohort, Lp(a) ran 27 percent higher in women after menopause [14]. I check Lp(a) in perimenopause and again after menopause.
Summary: At 42, you may wake up at 4 a.m., exhausted and irritable. Your doctor may check a few labs and claim you’re too young for hormone therapy. The post argues that “too young” is an outdated idea: perimenopause can start in the mid-to-late thirties, and a single blood test often misses it because hormones swing so widely. Cycle changes, broken sleep, and irritability are better signals, and falling progesterone helps explain the last two. It closes with five signs and five questions to bring to your next appointment, plus your own story of starting perimenopause in your late thirties.
I explained her she wasn’t too young, and that her symptoms deserved a full workup and a serious conversation about treatment. We screened for sleep apnea, checked her thyroid and iron, and looked at her cardiovascular markers (more on those here). We talked through bedtime oral micronized progesterone: what the evidence shows, where it’s thin, and what we’d consider if she needed more. We also talked about the load she carried. Progesterone might give her back her sleep, but it was never going to cover the school pickups or run her board meetings.
I’ve sat in her chair. I was in my late thirties when my own hormones began to shift, years before anyone would have called it perimenopause, and I remember how easy it was to wonder what was wrong with me. Why didn’t I have energy for life? Why was I stuck in survival mode? Why did most things make me irritable?
I’m a doctor, so I scienced myself. My progesterone was low. My cortisol was high, as were my insulin and fasting glucose. I was running out of healthy eggs and at the start of perimenopause.
I started chasteberry, the dried fruit of the chaste tree, Vitex agnus-castus L. It’s an herbal extract thought to act through dopamine at the pituitary, lowering prolactin and supporting the second half of the cycle. In the best-known trial, women with PMS took 20 mg a day of a standardized extract, and 52 percent cut their symptoms by half or more, compared with 24 percent on placebo [15]. Most products fall in the range of 20 to 40 mg of standardized extract once a day. It isn’t for pregnancy or breastfeeding, and it can interfere with hormonal contraception and with drugs that act on the pituitary. It worked for me for a year or two. Then my sleep suffered, and I started oral micronized progesterone in the luteal phase: at first 100 mg at night on cycle days 12 to 26, then 200 mg at night.
I’m also the mother of two daughters, and I think about the doctor they’ll see when they’re 42.
I believe relief shouldn’t come with an age requirement. A woman who has been awake at 4 a.m. for three years has waited long enough. Print this, take it to your next appointment, and ask every question on it out loud.
How old were you when someone first told you that you were too young for this?
My new book, The Female Edge, publishes March 30, 2027. Preorder it here.
[1] Harlow SD, et al. “Executive Summary of the Stages of Reproductive Aging Workshop + 10: Addressing the Unfinished Agenda of Staging Reproductive Aging.” Menopause 19, no. 4 (2012): 387–95.
[2] Cunningham AC, et al. “Perimenopause Symptoms, Severity, and Healthcare Seeking in Women in the US.” npj Women’s Health 3 (2025): 12.
[3] Kling JM, et al. “Menopause Management Knowledge in Postgraduate Family Medicine, Internal Medicine, and Obstetrics and Gynecology Residents: A Cross-Sectional Survey.” Mayo Clinic Proceedings 94, no. 2 (2019): 242–53.
[4] The North American Menopause Society. “The 2022 Hormone Therapy Position Statement of The North American Menopause Society.” Menopause 29, no. 7 (2022): 767–94.
[5] Burger HG, et al. “Hormonal Changes in the Menopause Transition.” Recent Progress in Hormone Research 57 (2002): 257–75.
[6] National Institute for Health and Care Excellence. Menopause: Identification and Management. NICE Guideline NG23. London: NICE, 2015, updated 2024.
[7] Santoro N, et al. “Characterization of Reproductive Hormonal Dynamics in the Perimenopause.” Journal of Clinical Endocrinology and Metabolism 81, no. 4 (1996): 1495–1501.
[8] Majewska MD, et al. “Steroid Hormone Metabolites Are Barbiturate-Like Modulators of the GABA Receptor.” Science 232, no. 4753 (1986): 1004–7.
[9] Kravitz HM, et al. “Sleep Disturbance During the Menopausal Transition in a Multi-Ethnic Community Sample of Women.” Sleep 31, no. 7 (2008): 979–90.
[10] Prior JC, et al. “Oral Micronized Progesterone for Perimenopausal Night Sweats and Hot Flushes: A Phase III Canada-Wide Randomized Placebo-Controlled 4 Month Trial.” Scientific Reports 13 (2023): 9082.
[11] Bromberger JT, et al. “Persistent Mood Symptoms in a Multiethnic Community Cohort of Pre- and Perimenopausal Women.” American Journal of Epidemiology 158, no. 4 (2003): 347–56.
[12] Young T, et al. “Menopausal Status and Sleep-Disordered Breathing in the Wisconsin Sleep Cohort Study.” American Journal of Respiratory and Critical Care Medicine 167, no. 9 (2003): 1181–85.
[13] Matthews KA, et al. “Are Changes in Cardiovascular Disease Risk Factors in Midlife Women Due to Chronological Aging or to the Menopausal Transition?” Journal of the American College of Cardiology 54, no. 25 (2009): 2366–73.
[14] Simony SB, et al. “Sex Differences of Lipoprotein(a) Levels and Associated Risk of Morbidity and Mortality by Age: The Copenhagen General Population Study.” Atherosclerosis 355 (2022): 76–82.
[15] Schellenberg R. “Treatment for the Premenstrual Syndrome with Agnus Castus Fruit Extract: Prospective, Randomised, Placebo Controlled Study.” BMJ 322, no. 7279 (2001): 134–37.
