Understanding Women’s Hormonal Health Across the Decades
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For many years, I assumed that painful periods were just part of being a woman. I would often feel nauseous during my cycle, and bleeding through a super tampon and pad was something I just accepted as normal. It wasn’t until I was in my late thirties that I discovered I had mild endometriosis while being tested for something unrelated. After being recommended an IUD, I haven’t experienced any pain or heavy bleeding since.
But here’s the thing: when it comes to women’s pain and health, we often assume it’s just normal. However, this mindset can prevent us from seeking the help we need. So how do we know what is truly “normal” and what might be a sign of something more serious?
On a recent episode of the WELL podcast, Claire Murphy explored the topic of hormonal health with experts to help us understand our hormone guide for the 20s, 30s, 40s, and beyond. The discussion included a “red flag” checklist every woman should be aware of.
The Invisible Conductor
How many times have you wondered if you were losing your mind? We often blame coffee, lack of sleep, or the pressures of modern life, but there is usually a deeper, more subtle force at play. According to Claire Murphy, we are not just navigating life; we are being guided by a complex internal system. As she put it, “We are just basically a collection of hormones all trying to work together.”
When one part of this system—such as the thyroid, adrenals, or ovaries—goes off track, it can throw the whole system into chaos. This can lead to questions about our sanity: is this just a bad day, or is our biology staging a coup?
The 20s: The Baseline Decade
For many, the 20s are a blur of socializing and career-building, but hormonally, this is actually your “Golden Baseline.” This is the decade where the erratic signals of puberty are supposed to settle into a predictable rhythm.
Dr Isabelle Smith, an endocrinologist, explained that our 20s are a period of peak efficiency. She noted that “hormones in those teenage years and early 20s are often higher, and then by the time we hit our late 20s, our cycles should have levelled out.” If they haven’t, that’s a sign that something might be wrong.
This decade is also known as the “Testosterone Peak.” While testosterone is often associated with men, Dr Smith highlighted that it plays a significant role in women too. Our testosterone starts its gradual decline in our early 20s, which can affect libido and energy levels. Many women in their 30s look back at their 20s as their “normal” sex drive, not realizing they were actually at a biological high point.
The 30s and 40s: The Peak and the Plateau
By the time we reach our 30s and 40s, we’re often juggling careers, kids, and the mental load of running a household. This is the decade where hormonal conditions that may have been simmering in the background start to “raise their ugly heads.”
Dr Smith pointed out that even though cycles should be consistent, this is the prime window for conditions like Polycystic Ovary Syndrome (PCOS) and Premenstrual Dysphoric Disorder (PMDD). If you decide to have children during this time, you’re in for a “rapid drop” in hormones after the baby is born, leading to a systemic biological crash.
Dr Natasha Andreadis, a gynaecologist and fertility specialist, emphasized the impact of stress on hormonal balance. She warned that chronic stress can lead to insulin resistance, which isn’t just related to the ovaries but also to overall health.
The 50s: The Window of Chaos
Entering your 50s usually means navigating the “Window of Chaos,” the transition through perimenopause into menopause. Dr Andreadis referred to this era as a “second puberty,” and it can feel like total mayhem.
One of the most important points Dr Andreadis raised was the “Cardiovascular Connection.” Before menopause, oestrogen provides cardiovascular protection. As those levels fall, the protective effects diminish, leading to an increase in “bad” cholesterol and “arterial stiffness.” This is why women’s risk of heart disease and stroke jumps significantly in their 50s.
There is also the “Brain Fog,” which is not just a result of being busy. Dr Andreadis confirmed that oestrogen and progesterone receptors are in our brains, so when these hormones fluctuate, memory and sleep are affected. However, she offered a silver lining: addressing these changes through lifestyle, nutrition, or Menopausal Hormone Therapy (MHT) can often clear the fog.
The “Red Flag” Hormonal Checklist
According to Dr Jinny Foo, Obstetrician, Gynaecologist, and Fertility Specialist, along with other experts, these are the hormonal red flags you should be taking to your GP:
- Pain that hijacks your life: If your period pain is so severe that it forces you to cancel plans, miss work, or give up hobbies, that is not “just being a woman.”
- The disappearing act: If you haven’t had a period for six months or more (and you aren’t pregnant or already through menopause), it’s a red flag.
- Mood shifts that alter your personality: If your PMS or PMDD symptoms feel unmanageable or make you feel like a different person each month, seek help.
- Sudden physical “glitches”: Things like heart palpitations, ‘brain fog’ that stops you from functioning, or sudden weight gain around your abdomen are signs of shifting hormone levels.
- Bleeding in the “no-go” zone: If you have officially hit menopause and experience any vaginal bleeding, see a doctor immediately.
- A shaky family history: If you have a known family history of osteoporosis or high fracture risk, be proactive about bone density checks.
Whether you’re 25 and wondering why your skin is breaking out, or 55 and wondering where your memory went, you don’t have to just “tough it out.” You have the right to ask questions, seek specialists, and take back the baton from the invisible conductor.

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