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What really is Perimenopause?
Perimenopause, the transitional phase leading up to menopause, is characterized by hormonal fluctuations that can bring about various symptoms such as irregular periods, hot flashes, night sweats, mood swings, and sleep disturbances.
Women experiencing both perimenopause and thyroid issues may face compounded challenges, as the symptoms of one condition can intensify those of the other. It is crucial to manage thyroid health during perimenopause to alleviate symptoms and improve overall well-being.
During the perimenopause phase, changes can occur…
- Irregular menstrual cycles: One of the first signs of perimenopause is changes in menstrual patters. Your periods may become irregular, with variations in cycle length, flow, or skipped periods altogether.
- Hot flashes and night sweats: Many women experience hot flashes, characterized by sudden feelings of intense heat that can lead to sweating, flushing, and rapid heartbeat. Night sweats, which occur during sleep can also disrupt your sleep patterns.
- Mood swings and emotional changes: Hormonal fluctuations during perimenopause can contribute to mood swings, irritability, anxiety, and feelings of sadness or depression.
- Vaginal dryness and discomfort: Declining hormone levels can lead to vaginal dryness, itching, and discomfort during sexual intercourse.
- Sleep disturbances: Hormonal changes can make it challenging to fall asleep or stay asleep.
- Changes in libido: Some women notice a decrease in sexual desire or changes in their sexual response during perimenopause.
- Changes in breast tissue: You may experience breast tenderness or changes in breast tissue density during menopause.
Main hormonal changes:
- Progesterone: Progesterone drops faster in midlife than estrogen. This decline is the main driver of various symptoms including mood swings, sleep disturbances, and irregular menstrual cycles. In perimenopause, estrogen levels are now known to average 30% higher, to be constantly fluctuating, and to be associated with less progesterone. Progesterone is soothing, anti-inflammatory, and crucial for counterbalancing estrogen's effects. It plays a key role in calming the nervous system and supporting restful sleep. Without sufficient progesterone, the overstimulation caused by elevated and erratic estrogen levels can lead to symptoms such as anxiety, breast tenderness, and irregular menstrual cycles.
- Estrogen: Research by the UBC Endocrinology Centre for Menstrual Cycle and Ovulation Research shows that perimenopausal women may experience heavy flow, sore breasts, and migraine headaches related to higher estrogen levels. [Estrogen increases prostaglandins,](https://www.sciencedirect.com/science/article/abs/pii/0306987788900382#:~:text=Several lines of evidence support,primary cultures of rabbit endometrium.) molecules that regulate the pain response, which can intensify cramping, headaches, and other inflammatory symptoms. Elevated estrogen levels during perimenopause are often accompanied by fluctuations, which can exacerbate mood swings, fatigue, and heightened sensitivity to pain.
- Pregnenolone: Known as the "mother hormone," pregnenolone is a precursor to many other hormones. As women approach perimenopause, the production of pregnenolone in the body decreases. This decline contributes to the hormonal imbalances that characterize perimenopause. The highest concentrations of pregnenolone are found in the brain where it is [metabolized into allopregnenolone](https://www.sciencedirect.com/science/article/abs/pii/S0091302219300512#:~:text=Pregnenolone is metabolized directly to,3β%2C 5α pregnanolone (Fig.), a neurosteroid that soothes the nervous system, improve mood, and support sleep. A decline in pregnenolone may decrease allopregnenolone and contribute to anxiety, mood swings, irritability, and heightened stress.
