Carolina B-Well Blog

Hormone Changes in Perimenopause and Menopause

Lora Burleyson

October 8, 2025

Perimenopause and menopause are natural stages in a woman’s life marked by significant hormonal changes. These transitions can affect physical health, emotional well-being, and overall quality of life. Understanding what happens hormonally during perimenopause and menopause can help women prepare for and manage the changes that come with this period.

What Is Perimenopause?

Perimenopause is the time leading up to menopause, typically beginning in a woman’s 40s, but it can start earlier for some. This phase may last anywhere from a few months to several years. During perimenopause, the ovaries gradually produce less estrogen, the hormone responsible for regulating the menstrual cycle and supporting reproductive health.

Key Hormonal Changes During Perimenopause

  • Fluctuating Estrogen Levels: Estrogen levels rise and fall unevenly, causing irregular periods. These fluctuations can also lead to symptoms like hot flashes, night sweats, and mood swings.
  • Decreasing Progesterone: Progesterone, another hormone involved in the menstrual cycle, also declines. Lower progesterone can contribute to heavier or skipped periods and may affect sleep and mood.
  • Changes in Follicle-Stimulating Hormone (FSH): As ovaries become less responsive, the body increases production of FSH in an attempt to stimulate ovulation. Higher FSH levels are a marker of the perimenopausal transition.

What to Expect in Menopause

Menopause is defined as the point in time when a woman has not had a period for 12 consecutive months. The average age for menopause in the United States is 51. By this stage, the ovaries have stopped releasing eggs and produce much less estrogen and progesterone.

Key Hormonal Changes During Menopause

  • Low Estrogen Levels: Estrogen production drops significantly, which can lead to symptoms such as hot flashes, vaginal dryness, and increased risk of osteoporosis and heart disease.
  • Low Progesterone: Progesterone levels remain low, often resulting in less protection against the effects of estrogen dominance that can occur during the earlier transition.
  • Testosterone Fluctuations: Although primarily known as a male hormone, women also produce testosterone. Its levels may decline, potentially affecting libido, energy, and muscle mass.

Common Symptoms Linked to Hormonal Changes

  • Irregular periods during perimenopause, ending in cessation at menopause
  • Hot flashes and night sweats
  • Sleep disturbances
  • Changes in mood, such as irritability or depression
  • Vaginal dryness and discomfort during intercourse
  • Decreased bone density
  • Changes in metabolism, leading to weight gain

Managing Hormonal Changes

While these changes are a natural part of aging, some women seek relief from symptoms through lifestyle changes, hormone therapy, or non-hormonal medications. Healthy eating, regular exercise, stress reduction, and good sleep hygiene can help manage symptoms. It’s important to consult with a healthcare provider to discuss the best approach for your individual needs.

Perimenopause and menopause are marked by significant hormonal changes that affect many aspects of health. Being informed about what to expect can empower women to navigate this life stage more comfortably and proactively manage their well-being.

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