Perimenopause Symptoms and Age: What to Expect

What exactly is perimenopause?

Perimenopause means "around menopause." It is the hormonal transition that happens before periods stop entirely. During this phase, the ovaries gradually produce less estrogen. Menopause itself is a single moment in time — the one-year anniversary of your last menstrual period. Everything leading up to that point is perimenopause 1Ref 1The Menopause Society (NAMS) (2024).Perimenopause.Up to 80% of women experience hot flashes/night sweats during the menopause transition; 40–60% report cognitive symptoms; description of vasomotor and genitourinary symptoms2Ref 2Faubion SS, Crandall CJ, Davis L, El Khoudary SR, Hodis HN, Lobo RA, Maki PM, Manson JE, Pinkerton JV, Santoro NF, Shifren JL, Shufelt CL, Thurston RC, Wolfman W (2022).The 2022 Hormone Therapy Position Statement of The North American Menopause Society.Hormone therapy effectiveness and safety for vasomotor symptoms in women under 60 or within 10 years of menopause; perimenopause transition characterization; contraception during perimenopause.

Perimenopause is not a disease — it is a natural biological transition. But for many people, the hormonal fluctuations produce symptoms significant enough to warrant evaluation and treatment.

What age does perimenopause typically start?

The menopausal transition typically spans several years, with the early transition stage beginning at a median age of about 47 and the final menstrual period occurring at a median age of approximately 51 3Ref 3Santoro N (2016).Perimenopause: From Research to Practice.Median age of early transition ~47, late transition ~49, final menstrual period ~51; hot flash prevalence ~67% in perimenopause; depressive symptom prevalence increases during early transition. Some people enter perimenopause as early as the late 30s or early 40s, which is sometimes called early perimenopause.

Factors that can influence timing include: - Genetics / family history — timing tends to run in families - Smoking — associated with earlier menopause - Certain medical treatments — chemotherapy or surgery affecting the ovaries can trigger early transition

If you are experiencing symptoms before age 40, your gynecologist should evaluate whether this reflects early perimenopause or primary ovarian insufficiency 2Ref 2Faubion SS, Crandall CJ, Davis L, El Khoudary SR, Hodis HN, Lobo RA, Maki PM, Manson JE, Pinkerton JV, Santoro NF, Shifren JL, Shufelt CL, Thurston RC, Wolfman W (2022).The 2022 Hormone Therapy Position Statement of The North American Menopause Society.Hormone therapy effectiveness and safety for vasomotor symptoms in women under 60 or within 10 years of menopause; perimenopause transition characterization; contraception during perimenopause.

What are the most common symptoms?

Symptoms result from fluctuating — and gradually declining — estrogen levels. The experience is highly individual.

Changes to the menstrual cycle are usually the first sign. Cycles may become shorter, longer, heavier, lighter, or unpredictable before eventually stopping.

Vasomotor symptoms — hot flashes and night sweats — are the most commonly reported symptoms of the menopause transition, experienced by up to 80% of women at some point 1Ref 1The Menopause Society (NAMS) (2024).Perimenopause.Up to 80% of women experience hot flashes/night sweats during the menopause transition; 40–60% report cognitive symptoms; description of vasomotor and genitourinary symptoms. They involve sudden warmth spreading over the upper body, sometimes followed by sweating and chills.

Sleep disturbances — difficulty falling or staying asleep, often worsened by night sweats.

Mood changes — irritability, low mood, or increased anxiety. Depressive symptoms increase in prevalence during the early transition 3Ref 3Santoro N (2016).Perimenopause: From Research to Practice.Median age of early transition ~47, late transition ~49, final menstrual period ~51; hot flash prevalence ~67% in perimenopause; depressive symptom prevalence increases during early transition.

Cognitive symptoms — 40 to 60 percent of midlife women report forgetfulness or difficulty concentrating during the menopause transition 1Ref 1The Menopause Society (NAMS) (2024).Perimenopause.Up to 80% of women experience hot flashes/night sweats during the menopause transition; 40–60% report cognitive symptoms; description of vasomotor and genitourinary symptoms.

Genitourinary changes — vaginal dryness, discomfort during sex, and urinary frequency or urgency as the vaginal and urethral tissues thin.

How is perimenopause different from menopause?

Perimenopause is the transition; menopause is the milestone. You have reached menopause when you have gone 12 full consecutive months without a period. After that point you are in postmenopause 2Ref 2Faubion SS, Crandall CJ, Davis L, El Khoudary SR, Hodis HN, Lobo RA, Maki PM, Manson JE, Pinkerton JV, Santoro NF, Shifren JL, Shufelt CL, Thurston RC, Wolfman W (2022).The 2022 Hormone Therapy Position Statement of The North American Menopause Society.Hormone therapy effectiveness and safety for vasomotor symptoms in women under 60 or within 10 years of menopause; perimenopause transition characterization; contraception during perimenopause.

During perimenopause, pregnancy is still biologically possible because ovulation can still occur — even when periods are irregular. Effective contraception remains relevant until you have confirmed menopause 2Ref 2Faubion SS, Crandall CJ, Davis L, El Khoudary SR, Hodis HN, Lobo RA, Maki PM, Manson JE, Pinkerton JV, Santoro NF, Shifren JL, Shufelt CL, Thurston RC, Wolfman W (2022).The 2022 Hormone Therapy Position Statement of The North American Menopause Society.Hormone therapy effectiveness and safety for vasomotor symptoms in women under 60 or within 10 years of menopause; perimenopause transition characterization; contraception during perimenopause.

How long does perimenopause last?

On average, perimenopause lasts about 4 years, but it can range from just a few months to more than 10 years. The final 1 to 2 years before menopause, when estrogen drops most sharply, tend to produce the most noticeable symptoms. Symptoms like hot flashes often continue into postmenopause for several years before gradually improving 2Ref 2Faubion SS, Crandall CJ, Davis L, El Khoudary SR, Hodis HN, Lobo RA, Maki PM, Manson JE, Pinkerton JV, Santoro NF, Shifren JL, Shufelt CL, Thurston RC, Wolfman W (2022).The 2022 Hormone Therapy Position Statement of The North American Menopause Society.Hormone therapy effectiveness and safety for vasomotor symptoms in women under 60 or within 10 years of menopause; perimenopause transition characterization; contraception during perimenopause.

Are there tests to confirm perimenopause?

There is no single definitive test. Because estrogen and FSH (follicle-stimulating hormone) fluctuate considerably during this transition, a single blood draw can be misleading. Clinicians generally diagnose perimenopause based on age, symptom pattern, and menstrual history rather than lab results alone 2Ref 2Faubion SS, Crandall CJ, Davis L, El Khoudary SR, Hodis HN, Lobo RA, Maki PM, Manson JE, Pinkerton JV, Santoro NF, Shifren JL, Shufelt CL, Thurston RC, Wolfman W (2022).The 2022 Hormone Therapy Position Statement of The North American Menopause Society.Hormone therapy effectiveness and safety for vasomotor symptoms in women under 60 or within 10 years of menopause; perimenopause transition characterization; contraception during perimenopause.

Blood work can be useful to rule out other causes — thyroid conditions and low iron, for example, can produce overlapping symptoms. A gynecologist or OB-GYN is the right clinician to evaluate and discuss testing.

What can help manage symptoms?

Lifestyle measures that many people find helpful include regular aerobic exercise, cooling strategies for hot flashes (layers, a bedside fan), limiting alcohol and spicy foods, and consistent sleep habits.

Hormone therapy (HT) is the most effective treatment for vasomotor symptoms (hot flashes and night sweats) and vaginal dryness. The North American Menopause Society's 2022 position statement concludes that for women under 60 or within 10 years of menopause, the benefits of HT outweigh the risks for most women without contraindications 2Ref 2Faubion SS, Crandall CJ, Davis L, El Khoudary SR, Hodis HN, Lobo RA, Maki PM, Manson JE, Pinkerton JV, Santoro NF, Shifren JL, Shufelt CL, Thurston RC, Wolfman W (2022).The 2022 Hormone Therapy Position Statement of The North American Menopause Society.Hormone therapy effectiveness and safety for vasomotor symptoms in women under 60 or within 10 years of menopause; perimenopause transition characterization; contraception during perimenopause. Decisions about HT should be individualized based on health history, cardiovascular risk, and personal preference.

Non-hormonal medications — the 2023 NAMS position statement on nonhormone therapy identifies several evidence-based options for vasomotor symptoms, including SSRIs/SNRIs, gabapentin, and oxybutynin for those who cannot or prefer not to use hormone therapy 4Ref 4The Menopause Society (NAMS) (2023).The 2023 Nonhormone Therapy Position Statement of The Menopause Society.Evidence-based non-hormonal options for vasomotor symptoms including SSRIs/SNRIs, gabapentin, and oxybutynin.

Local vaginal estrogen — addresses genitourinary symptoms (dryness, discomfort, urinary symptoms) with minimal systemic absorption; generally considered safe for most people.