Perimenopause is a natural transition phase leading up to menopause, marked by fluctuating hormone levels and various symptoms. This phase can last several years, during which menstrual cycles become irregular and symptoms like hot flashes and mood changes may intensify or fluctuate1 2. Understanding the signs that perimenopause is ending can help women prepare for menopause and seek appropriate care to manage symptoms effectively2 .
Longer Gaps Between Periods
One of the most telling signs that perimenopause is nearing its end is the increasing length of time between menstrual periods. During early perimenopause, menstrual cycles may vary by more than seven days but remain relatively regular3 . However, as women enter late perimenopause, amenorrhea (absence of menstruation) becomes more prolonged, lasting for 60 days or more, signaling significant ovarian aging and the approach of menopause3 . This prolonged amenorrhea is a hallmark of the late menopausal transition and often precedes the final menstrual period3 .
Tracking menstrual cycles can provide valuable clues. Longer gaps between periods, sometimes exceeding two months, indicate that ovulation is becoming less frequent or absent4 . Despite irregular cycles, pregnancy is still possible during perimenopause until 12 consecutive months without menstruation have passed4 .
Hot Flash Patterns Change
Vasomotor symptoms, including hot flashes and night sweats, are among the most common and distressing symptoms during perimenopause. These symptoms result from fluctuating estrogen levels affecting the hypothalamic thermoregulatory center, which controls body temperature5 6. Hot flashes involve sudden vasodilation and sweating, often lasting several minutes5 6.
As women approach the final menstrual period, vasomotor symptoms often increase in frequency and severity, peaking in late perimenopause and early postmenopause5 . Up to 80% of women experience these symptoms during the menopausal transition5 . Interestingly, while some women find their hot flashes intensify as perimenopause ends, others may notice these symptoms start to ease after menopause7 2.
The median duration of vasomotor symptoms is about 7.4 years, with some women experiencing them for a decade or longer8 . Management options include lifestyle changes, hormone therapy, and nonhormonal medications to alleviate these symptoms9 .
Emotional Shifts
Mood changes are common during perimenopause and are largely influenced by fluctuating estrogen levels, which affect brain regions regulating mood and cognition5 6. Symptoms can include irritability, mood swings, anxiety, and depression10 11. Mood symptoms tend to peak in late perimenopause, coinciding with the greatest hormonal fluctuations10 .
The perimenopausal period may represent increased psychiatric vulnerability, particularly for mood disorders12 . Women with a history of mood disorders or hormonal mood changes such as premenstrual syndrome are at higher risk11 . Both biological factors (hormonal changes) and psychosocial stressors contribute to mood instability during this time10 .
Despite mood swings often decreasing as perimenopause ends, depression and anxiety can persist into early postmenopause2 . Effective treatments include menopausal hormone therapy, antidepressants, and lifestyle modifications such as stress reduction and improved sleep hygiene11 .
“When you think of perimenopause—the years leading to menopause—you may think of the physical symptoms: hot flashes, night sweats, and the eventual end of periods. But many people also experience mood symptoms during this time. As an ob-gyn and psychiatrist, I wish everyone understood how perimenopause can affect mental health. Here are the top facts you should know.”
— Dr. Nazanin E. Silver, University of Pittsburgh Medical Center Central PA13
Sleep Pattern Changes
Sleep disturbances are frequent in perimenopausal women and can be multifactorial, involving hormonal changes, vasomotor symptoms, and mood disorders10 . Night sweats and hot flashes often disrupt sleep, leading to insomnia and poor sleep quality5 14. Poor sleep becomes more common not only due to menopausal transition but also as a consequence of aging10 .
Depressed mood and increased anxiety also rise during the menopausal transition, with an abrupt increase in late perimenopause, further impacting sleep quality10 . The triad of sleep disturbance, depressed mood, and sexual problems occurs in about 5% of midlife women, particularly those with higher psychosocial stress15 .
Improving sleep hygiene, managing vasomotor symptoms, and addressing mood disorders are key strategies to enhance sleep during this transition11 .
Sexual Function Shifts
Sexual function often changes during perimenopause due to declining estrogen levels, which cause atrophic changes in the genital tract16 . Common symptoms include vaginal dryness, dyspareunia (painful intercourse), and reduced sexual desire16 . These urogenital symptoms tend to increase as women approach their last menstrual period and continue into menopause16 2.
The genitourinary syndrome of menopause (GSM) encompasses symptoms such as vaginal dryness, urinary urgency, and increased urinary frequency17 2. GSM may affect more than half of women during perimenopause and postmenopause2 . Local estrogen therapies and lubricants can help alleviate vaginal dryness and improve sexual comfort16 .
Sexual desire may also decline due to hormonal changes, symptom severity, and psychosocial factors18 2.
Migraine Patterns
Migraine patterns during perimenopause are influenced by hormonal fluctuations, although high-quality evidence on migraine exacerbation or resolution during this time is limited19 20. Some women experience more frequent migraines earlier in perimenopause due to erratic hormone levels, poor sleep, and mood changes7 2. However, as hormone levels stabilize in late perimenopause and early menopause, migraine frequency may lessen7 2.
Migraines can be distressing and contribute to sleep deprivation, lethargy, and low mood during perimenopause16 . Managing migraines during this transition involves addressing hormonal changes, sleep quality, and mood symptoms.
Menopause Transition Stages
The STRAW +10 system is the international standard for staging reproductive aging, dividing the menopause transition into reproductive, menopausal transition, and postmenopause stages3 .
Reproductive Stage (Stages -5, -4, -3b and -3a)
- Stage -5 (Late Reproductive Years): Menstrual cycles are regular with normal hormone levels3 .
- Stage -4 (Early Perimenopause): Cycle length varies by more than seven days; hormone fluctuations begin3 .
- Stage -3b and -3a (Late Perimenopause): Amenorrhea lasts 60 days or more; significant hormonal fluctuations occur3 .
Menopausal Transition Stage (Stages -2 and -1)
- Stage -2: Amenorrhea extends beyond 60 days; follicle-stimulating hormone (FSH) levels rise3 .
- Stage -1: Final menstrual period occurs; diagnosis of menopause is retrospective after 12 months of amenorrhea16 3.
Postmenopause Stage (Stages +1a, +1b, +1c, and Stage +2)
- Stage +1a to +1c: Early postmenopause characterized by low estradiol, elevated FSH, and persistent vasomotor symptoms in some women5 .
- Stage +2: Late postmenopause with stabilization of hormone levels and symptom resolution for many5 .
| Stage | Menstrual Pattern | Hormonal Changes | Key Features |
|---|---|---|---|
| Late Reproductive (-5) | Regular cycles | Normal estrogen and FSH | Fertile, normal menstruation |
| Early Perimenopause (-4) | Cycle length varies >7 days | Fluctuating estrogen and FSH | Irregular periods begin |
| Late Perimenopause (-3) | Amenorrhea ≥60 days | Marked hormonal fluctuations | Approaching menopause |
| Menopausal Transition (-2,-1) | Final menstrual period occurs | Elevated FSH, low estradiol | Menopause diagnosis after 12 months |
| Early Postmenopause (+1) | No menstruation | Low estrogen, high FSH | Vasomotor symptoms persist |
| Late Postmenopause (+2) | No menstruation | Hormone levels stabilize | Symptoms often improve |
| Sources: 3165 | |||
Confirming Menopause Onset
Menopause is defined as the permanent cessation of menstruation resulting from loss of ovarian follicular activity, diagnosed retrospectively after 12 consecutive months of amenorrhea in the absence of other causes16 . There are no validated hormone cutpoints that predict the length of the menopausal transition or the final menstrual period; diagnosis should be based on clinical signs and symptoms21 .
Estradiol levels decline during the menopausal transition, but routine measurement is not required for diagnosis5 . Anti-Müllerian hormone (AMH) also declines with ovarian aging but is not established for diagnosing menopause21 .
Women should be aware that symptoms may persist or change after menopause, and ongoing care is important to manage health risks associated with low estrogen, such as osteoporosis and cardiovascular disease5 2.
When to Consult Your Doctor
Because the experience of perimenopause varies widely among women, it is important to consult a healthcare provider if symptoms are severe, persistent, or interfere with quality of life18 2. Seek medical advice if you experience:
- Very heavy or prolonged bleeding5 4.
- Bleeding between periods or after 12 months of amenorrhea5 4.
- Severe mood changes, depression, or anxiety10 11.
- Sleep disturbances impacting daily functioning10 .
- Symptoms of genitourinary syndrome such as pain or urinary urgency16 17.
Healthcare providers can help rule out other causes of abnormal bleeding or symptoms and offer treatment options including hormone therapy, nonhormonal medications, and lifestyle interventions5 2211.
Postmenopause marks the end of a woman’s reproductive years and lasts the rest of a woman’s life. Symptoms of perimenopause and menopause may continue during postmenopause. A woman is at higher risk for heart disease, low bone density, falls, genitourinary infections, cognitive impairment, and mood changes.
Key Takeaways
- Prolonged gaps of 60 days or more between periods signal late perimenopause and the approach of menopause3 .
- Hot flashes and night sweats often intensify in late perimenopause but may ease after menopause5 7.
- Mood swings peak during late perimenopause, but depression and anxiety can persist into postmenopause10 2.
- Sleep disturbances are common and multifactorial, involving hormonal changes, vasomotor symptoms, and mood disorders10 15.
- Sexual dysfunction, including vaginal dryness and decreased libido, increases as estrogen declines during late perimenopause16 2.
