A No-Nonsense Guide to Women’s Hormones

If you’ve ever googled your symptoms and landed on a page full of words like: estrogen, progesterone, LH, FSH and immediately closed the tab, you’re not alone.

Hormones are often explained like a chemistry lesson. Which is unfortunate, because you’re not studying them for an exam. You’re living them.

This isn’t a glossary. Think of this as someone finally sitting down with you and saying: “Here’s what’s actually going on.”

What Even Are Hormones?

Hormones are essentially your body’s messengers. They don’t just control your cycle; they influence:

• your mood
• your energy
• your appetite
• your sleep
• your focus
• your metabolism

They are not background processes. They are actively shaping how you feel and function. And unlike what we’ve been told, they’re not chaotic.

The Main Characters (Yes, There Are a Few)

Let’s start with the ones you’ll hear about most often : the hormones that directly shape your cycle.

Estrogen : The One That Builds and Boosts

If your body had a “glow-up” hormone, this would be it. Estrogen:

• regulates your menstrual cycle
• supports bone strength
• helps your heart, brain, and skin function well

It rises during puberty, fluctuates monthly, and peaks just before ovulation, which is often why you feel more energetic, social, or “like yourself” during that time. When estrogen drops (like during menopause or certain conditions), you may notice:

• irregular cycles
• lower bone density
• shifts in energy and mood

Progesterone : The One That Grounds You

If estrogen is the build-up, progesterone is the stabiliser. Its job is to:

• prepare your uterus for a possible pregnancy
• support early pregnancy
• regulate the second half of your cycle (luteal phase)

After ovulation, progesterone rises quietly. And then, if pregnancy doesn’t occur, it drops. This drop triggers your period. Low or fluctuating progesterone levels can show up as:

• PMS symptoms
• mood changes
• difficulty sustaining pregnancy

LH (Luteinizing Hormone) : The Trigger

LH is the moment of action. Right before ovulation, it spikes, and that spike is what tells your body: “Release the egg.” After that, it settles down again. If LH levels are off, it can affect:

• ovulation
• fertility
• cycle regularity

FSH (Follicle Stimulating Hormone) : The Starter

FSH works a little earlier in the cycle. Its role is to:

• stimulate your ovaries
• help follicles (which contain eggs) develop

Think of it as the hormone that starts the process that eventually leads to ovulation. Abnormal levels of FSH can be linked to:

• fertility issues
• menopause
• conditions like PCOS (through LH:FSH imbalance)

The Supporting Cast (Equally Important, Just Less Talked About)

These hormones don’t just affect your cycle, they affect how your entire body functions.

AMH (Anti-Müllerian Hormone)

This is often referred to when people talk about “ovarian reserve.” It gives an indication of how many eggs your ovaries may have. Lower levels can signal:

• reduced ovarian reserve
• fertility considerations

Testosterone (Yes, Women Have It Too)

Often misunderstood, but important. In women, testosterone supports:

• libido
• muscle mass
• bone health

Too much? Often linked to PCOS. Too little? Can affect energy and desire.

Thyroid Hormones : The Silent Regulator

Your thyroid affects:

• metabolism
• energy levels
• overall body function

When thyroid hormones are off, it can lead to:

• irregular periods
• fertility challenges
• fatigue

Cortisol : The Stress Signal

Cortisol isn’t ‘bad’, but chronic stress keeps it elevated. When that happens, it can:

• disrupt your cycle
• affect ovulation
• even lead to missed periods (amenorrhea)

Your body prioritises survival over reproduction. Always.

Insulin : The Energy Manager

Insulin regulates your blood sugar. But, when your body becomes insulin resistant (as seen in some cases of PCOS), it can:

• disrupt hormonal balance
• affect ovulation
• influence weight and energy levels

So Why Does All of This Feel So Confusing?

Because no one ever explains how these hormones work together. You’re not dealing with one hormone at a time, you experience a system of symbiotic relationships within your body. So, when one thing shifts; the others respond.

Which is why your mood, energy, cravings and focus can all feel different from week to week.

A Better Way to Look at It

Instead of thinking that your body is unpredictable and try understanding that your body is responding to something; because it is.

Hormones aren’t here to confuse you, they’re here to regulate you. You just haven’t been given the language to understand them until now.

REFERENCES & CITATIONS

• References
• Gustafsson, M. (2023). Female Reproductive Hormones
• Rosner et al. (2024). Female Reproductive Physiology