If hormones feel like a black box, this is the page to start with. There are three worth knowing well.
Oestrogen — the one that does almost everything. Oestrogen is the headline hormone of the female body, and its reach is enormous. It builds the womb lining each cycle, but it also supports bone strength, keeps skin and tissues supple, influences mood and memory, helps regulate body temperature, and supports heart and blood-vessel health. When people talk about menopause symptoms, they're often describing what happens as oestrogen becomes scarce: hot flushes, drier skin, mood shifts, thinning bones. Oestrogen isn't "the period hormone" — it's closer to a whole-body maintenance hormone.
Progesterone — the calming counterbalance. Progesterone rises in the second half of your cycle, after ovulation. Its job is to prepare and steady the womb lining, but it also has a gentle, calming effect on the brain and supports sleep. When progesterone is low — as it often is early in perimenopause, or in cycles where you don't ovulate — many women notice anxiety, irritability, and lighter, more broken sleep. Think of progesterone as oestrogen's steadying partner.
Testosterone — yes, yours too. It surprises many women to learn they produce testosterone, but they do — in smaller amounts than men, yet it's far from trivial. In women, testosterone contributes to libido, energy, mood, motivation, and muscle and bone strength. It declines gradually with age, and that quiet decline can be part of why drive and vitality dip in midlife.
How they change over a lifetime. In your reproductive years, oestrogen and progesterone rise and fall in a monthly rhythm. In perimenopause that rhythm becomes erratic — the source of so many confusing symptoms. After menopause, oestrogen and progesterone settle at low levels, while testosterone has usually been tapering gently for years.
Here's the empowering part: once you can name what each hormone does, your own experience stops feeling random. The 3 a.m. wake-ups, the mood that turns before your period, the dip in drive — each starts to make sense. And what makes sense is something you can finally do something about.
Do women have testosterone?
Yes — in smaller amounts than men, and it supports libido, energy, mood and muscle and bone strength.
What does progesterone do?
It steadies the womb lining after ovulation and has a calming effect that supports sleep.
Keep reading: 5 habits to balance hormones naturally · The first signs of perimenopause · Take the free Hormone Quiz