What Your Cycle Is Trying to Tell You: A Phase-by-Phase Wellness Guide

Most of us were taught one thing about our menstrual cycle: it happens roughly once a month, and then it's over until next time. But your cycle is more than a single event — it's four phases, each driven by a different hormonal environment, each doing different work in your body.

Understanding that rhythm means knowing yourself a little better, and being a bit gentler with yourself when your body is, quite literally, working differently than it was two weeks ago.

Here's what's actually happening in each phase and what the research does (and doesn't) say about supporting yourself through it.

Phase 1: Menstruation (roughly days 1–5)

This is the phase you know best, and the only one with a visible marker. Day 1 of your period is also day 1 of your cycle. Estrogen and progesterone are both at their lowest point, having dropped off after the previous cycle's corpus luteum broke down.

What's happening internally: Your uterus is shedding its lining. Meanwhile, your pituitary gland has already started releasing follicle-stimulating hormone (FSH), quietly kicking off the process of maturing the eggs for this cycle, so even while you're bleeding, the next phase is already beginning underneath the surface.

What you might notice: Lower energy, a pull toward rest, and for many people, cramps and fatigue as the uterus contracts to shed its lining. Interestingly, your core body temperature is typically at its lowest point of the month here (yup, that changes throughout the month too!)

What the research supports:

Magnesium has reasonable evidence behind it for period-related symptoms — several studies point to lower circulating magnesium during the luteal-to-menstrual transition in people with PMS, and it's thought to help via muscle relaxation and its role in calming inflammatory pathways involved in cramping. (Founder note: I swear by warm epsom salt baths during this phase!)
Gentle movement (walking, restorative yoga, stretching) is well tolerated and widely recommended, though the evidence that it outperforms rest for symptom relief specifically is limited — it's more that low-impact movement doesn't hurt and often helps your moo.
Heat (a hot water bottle, warm bath) is one of the more consistently supported non-drug approaches to period pain.

Phase 2: Follicular phase (roughly days 1–13, overlapping with your period)

Technically, the follicular phase starts on day 1 alongside your period and runs until ovulation — so the back half of your period and this phase overlap. But the second half of the follicular phase, after bleeding stops, is where things really shift.

What's happening internally: FSH is stimulating a group of follicles in your ovaries, each containing an immature egg. One follicle will become dominant. As it matures, it produces increasing amounts of estradiol (a form of estrogen), which rises steadily and peaks just before ovulation.

What you might notice: As estrogen climbs, many people report a genuine lift — more energy, better mood, sharper focus. This lines up with estrogen's role in supporting serotonin activity. Skin also tends to look a little more radiant here; one scoping review found skin elasticity measurably increases from the follicular phase into ovulation.

What the research supports:

This is generally considered a good window for higher-output activity as your energy and motivation tend to trend upward. That said, large studies (including one on athletes training through a five-week camp) have found resting metabolic rate stays essentially stable across the whole cycle, so there's no strong physiological reason you have to hold back in other phases either (founder note: although I def don't let that sway me from my dedicated couch time time when in phase 1!!!).
It's a reasonable time to schedule things that need focus or energy, simply because that's often how you'll be feeling — not because your body is incapable of that at other times.

Phase 3: Ovulation (roughly days 14, give or take)

The shortest phase, and the hinge point of your whole cycle.

What's happening internally: Estrogen peaks and triggers a surge in luteinising hormone (LH), which causes the mature follicle to release its egg, usually within about 24–36 hours of that estrogen peak. This is the only point in your cycle when pregnancy is possible.

What you might notice: For many, this is the energetic high point of the month — your confidence, sociability, and libido are commonly reported as elevated here, consistent with the estrogen peak. Some people notice mild one-sided pelvic twinges (sometimes called mittelschmerz) as the egg releases. (This shouldn't be severe though - if it is, then it's worth seeking medical support).

What the research supports: This phase is brief by design, so there's less to "optimise" here beyond noticing how you feel. If you're tracking your cycle for any reason, ovulation is the reference point everything else is measured from.

Phase 4: Luteal phase (roughly days 15–28)

The longest phase, and often the one people feel most in their body.

What's happening internally: After releasing the egg, the follicle transforms into the corpus luteum, which produces progesterone, which is the dominant hormone of this phase. Progesterone rises to support a potential pregnancy; if you don't conceive, the corpus luteum breaks down around day 26–28, both estrogen and progesterone fall sharply, and that drop is what triggers your next period.

What you might notice: This is where PMS symptoms (you know the ones - irritability, low mood, bloating, breast tenderness, food cravings, fatigue) tend to cluster, usually in the final third of the phase as hormones fall. There's a clear physiological reason for some of this discomfort: research shows core body temperature rises by roughly 0.3–0.7°C in the luteal phase, energy expenditure increases, and the body's ability to dissipate heat overnight is measurably suppressed, which is part of why sleep can feel more disrupted in the days before your period.

What the research supports:

Magnesium again(!) has the most consistent evidence of the supplements commonly discussed for this phase, particularly for mood-related PMS symptoms and sleep disturbance — thought to work partly through supporting serotonin and GABA activity as progesterone falls.
Prioritising sleep hygiene matters more here, given the genuine physiological disruption to your body's cooling process overnight — a slightly cooler room or lighter bedding may help more in this phase than others.
One 2024 study found people reported eating more during the luteal phase compared to the follicular phase, plausibly linked to the extra energy the body is using. If cravings show up here, that's a real metabolic shift, not a lack of willpower.

The honest bit: PMS is real and well documented, but PMDD (premenstrual dysphoric disorder) is a distinct and more severe condition. If you suffer from intense mood symptoms that meaningfully disrupt your daily life, it's worth talking to a doctor if what you're experiencing goes beyond what "a hard week" would explain.

So what do you actually do with all this?

Nothing drastic. You don't need a colour-coded meal plan or a rule that says you're only "allowed" to do certain workouts on certain days — the evidence simply doesn't support routines that rigid, and for athletes, studies have shown resting metabolism doesn't meaningfully shift across the cycle at all.

What the research does support is simpler: your body is genuinely doing different things from week to week — different hormone levels, different core temperature, different energy demands — and it's reasonable for how you feel to shift alongside that.

Tracking your own cycle for a few months and noticing your own patterns will tell you more than any generic phase guide, including this one. Your cycle isn't a problem to manage. It's information — and it's worth listening to. 💕