If you’ve been waking up in the middle of the night lately , wide awake at 3am with a racing mind, you’re not imagining things. Sleep changes are one of the most common (and frustrating) symptoms of perimenopause.
Many women assume it’s just part of getting older, but there’s a lot more going on beneath the surface. Your hormones, particularly oestrogen and progesterone, play a major role in how deeply and consistently you sleep.
In this post (and the latest Empowered Perimenopause podcast episode), we’ll explore why hormonal changes in perimenopause can disrupt your sleep, and what you can do to restore deep, restorative rest again.
Why You’re Waking Up in the Night
During perimenopause, oestrogen and progesterone start to fluctuate and eventually decline. These shifts influence your brain chemistry, nervous system, and even your body’s internal clock, known as the circadian rhythm.
Common sleep complaints include:
- Waking up too early
- Restless, light sleep
- Waking in the night and struggling to fall back asleep
- Feeling anxious or wired in the evenings
If this sounds familiar, your hormones (and how they interact with your stress and blood sugar levels) could be the reason.
The Role of Oestrogen in Sleep
1. Oestrogen and Your Body’s Internal Clock
Oestrogen helps regulate the suprachiasmatic nucleus (SCN), the “master clock” in your brain that controls your circadian rhythm.
When oestrogen levels fluctuate, this rhythm can fall out of sync, making it harder to fall asleep, stay asleep, or wake at the right times.
2. Oestrogen, Acetylcholine, and Deep Sleep
Oestrogen supports the production of acetylcholine, a neurotransmitter that helps with memory and nervous system function.
When levels drop, your vagal tone (the communication between your brain, heart, and gut) can weaken, making it harder to relax, digest properly, and stay asleep.
3. Oestrogen, Serotonin, and Melatonin
Oestrogen boosts serotonin, the neurotransmitter that helps us feel calm and content. Serotonin is also the precursor to melatonin, the hormone that helps you fall asleep. So when oestrogen dips, serotonin and melatonin can fall too, leading to restless sleep, low mood, and that frustrating “tired but wired” feeling.
Nutrition tip: You need enough dietary protein, especially from animal sources, to make serotonin and melatonin. Undereating or skipping protein can make sleep issues worse.
4. Oestrogen and Blood Sugar
Oestrogen helps regulate blood sugar and cortisol. When levels drop, it’s easier to experience nighttime blood sugar dips, which trigger cortisol spikes , waking you up suddenly in the night.
That’s why stabilising your blood sugar is one of the most powerful ways to support better sleep.
The Role of Progesterone in Sleep
While oestrogen gets a lot of attention, progesterone is equally important for restful sleep.
1. Progesterone and GABA
Progesterone is naturally calming because it increases GABA, a neurotransmitter that quiets brain activity and promotes relaxation. When progesterone declines (which often happens before oestrogen does), you may notice new anxiety, racing thoughts, or difficulty winding down at night.
2. Allopregnanolone: Progesterone’s Sleepy Sidekick
When progesterone breaks down, it forms allopregnanolone, a compound that soothes the nervous system and promotes deep sleep.
For most women, this metabolite helps significantly, but for a small subset of women, it can have the opposite effect, temporarily worsening anxiety.
3. How to Spot the Difference
- Waking up anxious = may be low progesterone and low GABA.
- Waking up wide awake but calm = likely oestrogen fluctuation or cortisol spike.
- Waking up hungry or shaky = blood sugar dip.
How to Support Deep, Restorative Sleep in Perimenopause
The good news? You can improve your sleep naturally once you understand what’s driving the disruption.
1. Balance Your Blood Sugar
- Eat enough protein at every meal (at LEAST 30g)
- Include slow-release carbs and healthy fats at dinner.
- Avoid skipping meals or eating sugary snacks before bed.
2. Support Your Circadian Rhythm
- Get morning daylight exposure within 30–60 minutes of waking.
- Reduce blue light from screens in the evening.
- Keep a consistent bedtime and wake-up time.
3. Use Calming Herbs and Nutrients
- GABA-supportive herbs: lemon balm, passionflower, chamomile, valerian, L-theanine.
- Oestrogen-balancing support: maca and black cohosh can help regulate symptoms.
- Progesterone support: Vitex (chasteberry) can promote ovulation and natural progesterone if you’re still cycling.
- Magnesium glycinate or threonate can also calm the nervous system and improve sleep depth.
4. Calm Your Nervous System
Chronic stress suppresses ovulation, lowers progesterone, and drives cortisol spikes.
Try:
- Gentle stretching or restorative yoga before bed
- EFT tapping or meditation
- Deep breathing or humming (to support vagal tone)
- A calming bedtime ritual with low lights and herbal tea
5. Address Gut-Driven Inflammation
If you’ve tried everything and still wake frequently, your gut health might be at play. Chronic inflammation from yeast, parasites, or mould can signal “danger” to the brain, keeping cortisol elevated and disrupting sleep.
Final Thoughts
Perimenopausal sleep issues aren’t all in your head, they’re biochemical. Your hormones are communicating with your brain, your nervous system, and your circadian rhythm.
When you learn how to support these systems, with balanced nutrition, stress management, and gentle hormonal support, your body can return to a rhythm that feels natural and deeply restorative.
You can sleep through the night again.
Listen to the full episode here. Episode 58: Wide Awake at 3am? How Hormonal Changes in Perimenopause Disrupt Sleep (and What You Can Do About It)
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