Oestrogen Dominance Symptoms and How to Fix It
Oestrogen dominance doesn't mean you have too much oestrogen. It means your oestrogen is high relative to your progesterone. This is the most common hormonal imbalance in perimenopause, and it causes a specific set of symptoms that many women recognise but can't explain.
During perimenopause, progesterone often drops faster than oestrogen. Your oestrogen may be normal or even low — but if your progesterone has dropped even more, the ratio between them is off. You're oestrogen-dominant not because of excess oestrogen, but because of insufficient progesterone to balance it.
This imbalance drives some of the most disruptive perimenopause symptoms: heavy periods, breast tenderness, mood swings, bloating, weight gain, and anxiety. The good news is that it's identifiable and addressable.
The symptoms of oestrogen dominance
Common signs of oestrogen dominance during perimenopause include:
- Heavy or prolonged periods
- Breast tenderness or swelling
- Mood swings, especially premenstrual
- Bloating and water retention
- Weight gain, particularly hips and thighs
- Anxiety and irritability
- Headaches, especially menstrual
- Fibroids or endometrial thickening
- Decreased sex drive
Not all of these need to be present. Even three or four, especially if they worsen in the premenstrual phase, suggest oestrogen dominance.
Why progesterone is the key
Progesterone is your "anti-oestrogen" hormone. It balances oestrogen's proliferative (growth-promoting) effects on your uterine lining, breasts, and other tissues. Without adequate progesterone, oestrogen acts unopposed — causing heavy periods, breast tenderness, and an increased risk of endometrial issues.
In perimenopause, ovulation becomes irregular. Progesterone is only produced after ovulation. If you don't ovulate in a given cycle, you produce little to no progesterone that month — but your oestrogen may still be relatively normal. This creates the oestrogen-dominant state.
This is also why oestrogen dominance isn't constant — it varies cycle to cycle, depending on whether you ovulated. Some months you feel fine, others you feel terrible. That variability is a hallmark of perimenopause hormone imbalance.
How to address oestrogen dominance
Support liver function. Your liver metabolises and clears excess oestrogen. If your liver is sluggish (from alcohol, poor diet, or lack of nutrients), oestrogen recirculates instead of being eliminated. Eat cruciferous vegetables (broccoli, cauliflower, Brussels sprouts) — they contain compounds that support oestrogen metabolism.
Ensure adequate fibre. Oestrogen is eliminated through the gut. If you're constipated or not eating enough fibre, oestrogen can be reabsorbed. Aim for 25-30 grams of fibre daily from vegetables, legumes, and whole foods.
Consider progesterone supplementation. If your progesterone is genuinely low (confirmed by testing on day 21 of your cycle), bio-identical progesterone can restore the balance. This should be prescribed and monitored by a healthcare provider.
Reduce alcohol. Alcohol increases oestrogen levels and impairs liver clearance. Even moderate drinking can worsen oestrogen dominance symptoms.
Want to know what's really going on in your body?
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Frequently Asked Questions
What are the symptoms of oestrogen dominance?
Common symptoms include heavy periods, breast tenderness, mood swings (especially premenstrual), bloating, weight gain on hips and thighs, anxiety, headaches, and decreased sex drive. If these worsen in the premenstrual phase, oestrogen dominance is likely.
Can you have oestrogen dominance if your oestrogen is low?
Yes. Oestrogen dominance is about the ratio between oestrogen and progesterone, not the absolute level of oestrogen. In perimenopause, progesterone often drops faster than oestrogen, creating a relative oestrogen dominance even when oestrogen levels are normal or low.
How do you fix oestrogen dominance naturally?
Support liver oestrogen clearance (eat cruciferous vegetables), ensure adequate fibre (25-30g daily to eliminate oestrogen through the gut), reduce alcohol (increases oestrogen and impairs liver function), and consider progesterone supplementation if testing confirms low progesterone.